From b879df9acecd3db4646908398fb641c72b123e95 Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sat, 20 Apr 2024 15:59:30 +0300
Subject: [PATCH 1/8] feat(objectionary#3035): add yamllint gh action template

---
 .github/workflows/yamllint.yml | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 .github/workflows/yamllint.yml

diff --git a/.github/workflows/yamllint.yml b/.github/workflows/yamllint.yml
new file mode 100644
index 0000000000..a6b72168bc
--- /dev/null
+++ b/.github/workflows/yamllint.yml
@@ -0,0 +1,15 @@
+---
+name: yamllint
+'on':
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+jobs:
+  yamllint:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ibiqlik/action-yamllint@v3

From a8157fe2165e2b63445e42f8b6f35fd364e977ec Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sun, 21 Apr 2024 15:51:05 +0300
Subject: [PATCH 2/8] feat(objectionary#3035): add .yamllint.yml config

---
 .github/workflows/yamllint.yml |  3 +++
 .yamllint.yml                  | 12 ++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 .yamllint.yml

diff --git a/.github/workflows/yamllint.yml b/.github/workflows/yamllint.yml
index a6b72168bc..57579e9bdc 100644
--- a/.github/workflows/yamllint.yml
+++ b/.github/workflows/yamllint.yml
@@ -1,4 +1,5 @@
 ---
+
 name: yamllint
 'on':
   push:
@@ -13,3 +14,5 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: ibiqlik/action-yamllint@v3
+        with:
+          config-file: .yamllint.yml
diff --git a/.yamllint.yml b/.yamllint.yml
new file mode 100644
index 0000000000..d8f013f2f8
--- /dev/null
+++ b/.yamllint.yml
@@ -0,0 +1,12 @@
+---
+
+extends: default
+
+rules:
+  line-length: disable
+  brackets:
+    min-spaces-inside: 1
+    max-spaces-inside: 2
+  truthy:
+    level: warning
+    allowed-values: [ 'on', 'true', 'false', 'yes', 'no' ]

From 2f26c87ee63fd95bdf6099cecc327ce15c6dbb2a Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sun, 21 Apr 2024 15:55:06 +0300
Subject: [PATCH 3/8] fix(objectionary#3035): fix .github/workflows yaml
 linting errors

---
 .github/workflows/codecov.yml         | 2 +-
 .github/workflows/daily.yml           | 3 ++-
 .github/workflows/ebnf.yml            | 4 ++--
 .github/workflows/gpt-code-review.yml | 7 ++++---
 .github/workflows/loc-badge.yml       | 2 +-
 .github/workflows/mvn.yml             | 2 +-
 .github/workflows/reports-check.yml   | 2 +-
 .github/workflows/simian.yml          | 4 ++--
 .github/workflows/sonar.yml           | 2 +-
 .github/workflows/up.yml              | 4 ++--
 .github/workflows/xcop.yml            | 2 +-
 .github/workflows/year.yml            | 5 +++--
 12 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index bf297ca989..5e2277b3be 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -16,7 +16,7 @@ jobs:
   codecov:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - uses: teatimeguest/setup-texlive-action@v3.2.1
         with:
           update-all-packages: true
diff --git a/.github/workflows/daily.yml b/.github/workflows/daily.yml
index 447e21a0cf..10fc6e92d5 100644
--- a/.github/workflows/daily.yml
+++ b/.github/workflows/daily.yml
@@ -1,3 +1,4 @@
+---
 name: daily
 on:
   schedule:
@@ -7,7 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - uses: teatimeguest/setup-texlive-action@v3.2.1
         with:
           update-all-packages: true
diff --git a/.github/workflows/ebnf.yml b/.github/workflows/ebnf.yml
index f25b0cc0d4..49b78baf8e 100644
--- a/.github/workflows/ebnf.yml
+++ b/.github/workflows/ebnf.yml
@@ -2,7 +2,7 @@
 name: ebnf
 on:
   push:
-    paths-ignore: ['paper/**', 'sandbox/**']
+    paths-ignore: [ 'paper/**', 'sandbox/**' ]
   pull_request:
     branches:
       - master
@@ -13,7 +13,7 @@ jobs:
     env:
       CONVERT_PATH: /tmp/antlr4-to-bnf-converter
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - run: |
           sudo apt-get update
           sudo apt-get -y install ghostscript imagemagick texlive-extra-utils pdf2svg inkscape
diff --git a/.github/workflows/gpt-code-review.yml b/.github/workflows/gpt-code-review.yml
index 2ead3da1db..114d285801 100644
--- a/.github/workflows/gpt-code-review.yml
+++ b/.github/workflows/gpt-code-review.yml
@@ -1,7 +1,8 @@
+---
 name: GPT-code-review
 on:
   pull_request:
-    branches: [master]
+    branches: [ master ]
 permissions:
   pull-requests: write
   contents: read
@@ -9,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
         with:
           fetch-depth: 0
       - uses: actions/setup-node@v4
@@ -23,4 +24,4 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BASE_SHA: ${{ github.event.pull_request.base.sha }}
           GITHUB_SHA: ${{ github.sha }}
-          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
\ No newline at end of file
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
diff --git a/.github/workflows/loc-badge.yml b/.github/workflows/loc-badge.yml
index d6ef9d0e8e..cc6d8c594e 100644
--- a/.github/workflows/loc-badge.yml
+++ b/.github/workflows/loc-badge.yml
@@ -11,7 +11,7 @@ jobs:
   loc-badge:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - uses: shadowmoose/GHA-LoC-Badge@1.0.0
         with:
           debug: true
diff --git a/.github/workflows/mvn.yml b/.github/workflows/mvn.yml
index 5c23dea5a3..bb32eafd8d 100644
--- a/.github/workflows/mvn.yml
+++ b/.github/workflows/mvn.yml
@@ -23,7 +23,7 @@ jobs:
     env:
       CONVERT_PATH: /tmp/antlr4-to-bnf-converter
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
diff --git a/.github/workflows/reports-check.yml b/.github/workflows/reports-check.yml
index 6f84511389..f092f9f174 100644
--- a/.github/workflows/reports-check.yml
+++ b/.github/workflows/reports-check.yml
@@ -2,7 +2,7 @@
 name: reports-check
 on:
   issues:
-    types: [opened]
+    types: [ opened ]
 permissions:
   issues: write
   contents: read
diff --git a/.github/workflows/simian.yml b/.github/workflows/simian.yml
index 0e5cf9c50d..e61ecede46 100644
--- a/.github/workflows/simian.yml
+++ b/.github/workflows/simian.yml
@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - master
-    paths-ignore: ['paper/**', 'sandbox/**']
+    paths-ignore: [ 'paper/**', 'sandbox/**' ]
   pull_request:
     branches:
       - master
@@ -16,7 +16,7 @@ jobs:
   simian:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
diff --git a/.github/workflows/sonar.yml b/.github/workflows/sonar.yml
index 0f580499ca..77d46ab33e 100644
--- a/.github/workflows/sonar.yml
+++ b/.github/workflows/sonar.yml
@@ -11,7 +11,7 @@ jobs:
   sonar:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
         with:
           fetch-depth: 0
       - uses: teatimeguest/setup-texlive-action@v3.2.1
diff --git a/.github/workflows/up.yml b/.github/workflows/up.yml
index 32c20b6b83..f45d7d0cb3 100644
--- a/.github/workflows/up.yml
+++ b/.github/workflows/up.yml
@@ -13,7 +13,7 @@ jobs:
   up:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - run: |-
           git fetch --tags --force && \
           latest=$(git tag --sort=creatordate | tail -1) && \
@@ -25,4 +25,4 @@ jobs:
           delete-branch: true
           title: 'New version in README'
           assignees: yegor256
-          base: master
\ No newline at end of file
+          base: master
diff --git a/.github/workflows/xcop.yml b/.github/workflows/xcop.yml
index bfa91b787d..e7b15ceaa5 100644
--- a/.github/workflows/xcop.yml
+++ b/.github/workflows/xcop.yml
@@ -14,7 +14,7 @@ jobs:
   xcop:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
       - uses: g4s8/xcop-action@v1.3
         with:
           files: |
diff --git a/.github/workflows/year.yml b/.github/workflows/year.yml
index 4fab297a17..90c4458df9 100644
--- a/.github/workflows/year.yml
+++ b/.github/workflows/year.yml
@@ -1,7 +1,8 @@
+---
 name: year
 on:
   schedule:
-    - cron: '0 1 22 * *' # Runs at 01:00 UTC on the 22nd of every month
+    - cron: '0 1 22 * *'  # Runs at 01:00 UTC on the 22nd of every month
 concurrency:
   group: year-${{ github.ref }}
   cancel-in-progress: true
@@ -9,7 +10,7 @@ jobs:
   license:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11  # v4
         with:
           fetch-depth: 0
       - uses: FantasticFiasco/action-update-license-year@v3

From 03d59a7608b9dde2197d415e0723f8008a789634 Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sun, 21 Apr 2024 16:07:03 +0300
Subject: [PATCH 4/8] fix(objectionary#3035): fix ./eo-maven-plugin yaml
 linting errors and warnings

---
 .../eolang/maven/binarize/add_rust/add-dependencies.yaml   | 3 ++-
 .../org/eolang/maven/packs/pre/as-type-optimization.yaml   | 1 +
 .../org/eolang/maven/packs/pre/bindings-to-java.yaml       | 1 +
 .../packs/pre/converts-to-java-with-arrays-and-scopes.yaml | 5 +++--
 .../org/eolang/maven/packs/pre/data-as-bytes.yaml          | 1 +
 .../resources/org/eolang/maven/packs/pre/dot-home.yaml     | 3 ++-
 .../org/eolang/maven/packs/pre/embedded-class.yaml         | 1 +
 .../org/eolang/maven/packs/pre/locators-to-java.yaml       | 1 +
 .../org/eolang/maven/packs/pre/long-class-name.yaml        | 1 +
 .../resources/org/eolang/maven/packs/pre/set-package.yaml  | 3 ++-
 .../maven/packs/pre/synthetic-attributes-with-to-java.yaml | 5 +++--
 .../org/eolang/maven/packs/pre/test-object-to-java.yaml    | 1 +
 .../org/eolang/maven/packs/pre/tests-moving-inside.yaml    | 3 ++-
 .../resources/org/eolang/maven/packs/pre/tests-test.yaml   | 3 ++-
 .../org/eolang/maven/packs/pre/tuple-to-java.yaml          | 1 +
 .../org/eolang/maven/packs/pre/underscore-to-java.yaml     | 1 +
 .../test/resources/org/eolang/maven/phi/yaml/as-phi.yaml   | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/atoms.yaml    | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/bindings.yaml | 3 ++-
 .../resources/org/eolang/maven/phi/yaml/bool-tests.yaml    | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/bytes.yaml    | 7 ++++---
 .../resources/org/eolang/maven/phi/yaml/custom-alias.yaml  | 5 +++--
 .../resources/org/eolang/maven/phi/yaml/empty-bytes.yaml   | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/empty.yaml    | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml | 3 ++-
 .../resources/org/eolang/maven/phi/yaml/full-path.yaml     | 3 ++-
 .../org/eolang/maven/phi/yaml/iterates-over-counter.yaml   | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/method.yaml   | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/nested.yaml   | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/one-byte.yaml | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/package.yaml  | 5 +++--
 .../org/eolang/maven/phi/yaml/same-name-inner.yaml         | 3 ++-
 .../test/resources/org/eolang/maven/phi/yaml/specials.yaml | 3 ++-
 .../org/eolang/maven/phi/yaml/with-anonym-abstract.yaml    | 3 ++-
 .../resources/org/eolang/maven/phi/yaml/with-data.yaml     | 3 ++-
 .../org/eolang/maven/phi/yaml/with-free-attributes.yaml    | 3 ++-
 .../src/test/resources/org/eolang/maven/pre/pre-data.yaml  | 1 +
 .../resources/org/eolang/maven/print/samples/bytes.yaml    | 3 ++-
 .../eolang/maven/print/samples/compares-bool-to-bytes.yaml | 1 +
 .../resources/org/eolang/maven/print/samples/dataless.yaml | 1 +
 .../org/eolang/maven/print/samples/empty-bytes.yaml        | 1 +
 .../org/eolang/maven/print/samples/empty-string.yaml       | 1 +
 .../org/eolang/maven/print/samples/idiomatic.yaml          | 1 +
 .../org/eolang/maven/print/samples/inheritance.yaml        | 1 +
 .../org/eolang/maven/print/samples/just-float.yaml         | 1 +
 .../org/eolang/maven/print/samples/multiline-string.yaml   | 1 +
 .../org/eolang/maven/print/samples/stars-tuples.yaml       | 1 +
 .../resources/org/eolang/maven/print/samples/times.yaml    | 1 +
 .../org/eolang/maven/sodg-packs/add-loc-to-objects.yaml    | 1 +
 .../resources/org/eolang/maven/sodg-packs/append-xi.yaml   | 1 +
 .../org/eolang/maven/sodg-packs/bind-rho-and-sigma.yaml    | 1 +
 .../org/eolang/maven/sodg-packs/bind-rho-to-abstract.yaml  | 1 +
 .../org/eolang/maven/sodg-packs/connect-dots-to-copy.yaml  | 1 +
 .../org/eolang/maven/sodg-packs/connect-dots.yaml          | 1 +
 .../resources/org/eolang/maven/sodg-packs/epsilons.yaml    | 1 +
 .../test/resources/org/eolang/maven/sodg-packs/focus.yaml  | 1 +
 .../org/eolang/maven/sodg-packs/normalize-attrs.yaml       | 1 +
 .../org/eolang/maven/sodg-packs/normalize-names.yaml       | 1 +
 .../resources/org/eolang/maven/sodg-packs/pi-copies.yaml   | 1 +
 .../resources/org/eolang/maven/sodg-packs/put-atoms.yaml   | 1 +
 .../resources/org/eolang/maven/sodg-packs/put-data.yaml    | 1 +
 .../resources/org/eolang/maven/sodg-packs/to-text.yaml     | 1 +
 .../resources/org/eolang/maven/sodg-packs/touch-all.yaml   | 1 +
 .../resources/org/eolang/maven/sodg-packs/unroll-refs.yaml | 1 +
 .../org/eolang/maven/sodg-packs/unroll-with-args.yaml      | 1 +
 .../test/resources/org/eolang/maven/sodgs/abstracts.yaml   | 1 +
 .../src/test/resources/org/eolang/maven/sodgs/arrays.yaml  | 2 +-
 .../src/test/resources/org/eolang/maven/sodgs/atoms.yaml   | 3 ++-
 .../resources/org/eolang/maven/sodgs/copy-of-abstract.yaml | 1 +
 .../resources/org/eolang/maven/sodgs/copy-of-argument.yaml | 2 +-
 .../src/test/resources/org/eolang/maven/sodgs/data.yaml    | 1 +
 .../test/resources/org/eolang/maven/sodgs/dot-on-ref.yaml  | 3 ++-
 .../src/test/resources/org/eolang/maven/sodgs/dots.yaml    | 1 +
 .../test/resources/org/eolang/maven/sodgs/inclusions.yaml  | 1 +
 .../src/test/resources/org/eolang/maven/sodgs/metas.yaml   | 3 ++-
 .../resources/org/eolang/maven/sodgs/nested-anonymous.yaml | 1 +
 .../src/test/resources/org/eolang/maven/sodgs/refs.yaml    | 1 +
 .../src/test/resources/org/eolang/maven/sodgs/rho.yaml     | 3 ++-
 .../src/test/resources/org/eolang/maven/sodgs/simple.yaml  | 3 ++-
 .../src/test/resources/org/eolang/maven/sodgs/vars.yaml    | 3 ++-
 .../src/test/resources/org/eolang/maven/unphi/atoms.yaml   | 3 ++-
 .../test/resources/org/eolang/maven/unphi/bindings.yaml    | 3 ++-
 .../test/resources/org/eolang/maven/unphi/bool-tests.yaml  | 3 ++-
 .../test/resources/org/eolang/maven/unphi/empty-bytes.yaml | 3 ++-
 .../resources/org/eolang/maven/unphi/long-names-inner.yaml | 3 ++-
 .../test/resources/org/eolang/maven/unphi/new-lines.yaml   | 3 ++-
 .../test/resources/org/eolang/maven/unphi/normalized.yaml  | 3 ++-
 .../test/resources/org/eolang/maven/unphi/one-byte.yaml    | 3 ++-
 .../src/test/resources/org/eolang/maven/unphi/package.yaml | 3 ++-
 .../src/test/resources/org/eolang/maven/unphi/spaces.yaml  | 3 ++-
 .../test/resources/org/eolang/maven/unphi/specials.yaml    | 3 ++-
 .../org/eolang/maven/unphi/with-anonym-abstract.yaml       | 3 ++-
 .../test/resources/org/eolang/maven/unphi/with-data.yaml   | 1 +
 .../test/resources/org/eolang/maven/unphi/with-home.yaml   | 5 +++--
 95 files changed, 150 insertions(+), 57 deletions(-)

diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/binarize/add_rust/add-dependencies.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/binarize/add_rust/add-dependencies.yaml
index 5bfc897794..2607dcf1a6 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/binarize/add_rust/add-dependencies.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/binarize/add_rust/add-dependencies.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/add_rust/add_rust.xsl
 document:
@@ -55,4 +56,4 @@ document:
 asserts:
   - /program/rusts/rust[@code_loc='Φ.org.eolang.creates-object.r.α0']
   - /program/rusts/rust/dependencies/dependency[@name='72 65 6F 3A 20 30 2E 30 2E 32']
-  - /program/rusts/rust/dependencies/dependency[@name='72 61 6E 64 3A 20 30 2E 35 2E 35']
\ No newline at end of file
+  - /program/rusts/rust/dependencies/dependency[@name='72 61 6E 64 3A 20 30 2E 35 2E 35']
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/as-type-optimization.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/as-type-optimization.yaml
index 2a43883bea..644b7831e9 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/as-type-optimization.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/as-type-optimization.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
   - /org/eolang/parser/optimize/globals-to-abstracts.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/bindings-to-java.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/bindings-to-java.yaml
index 73dcaaa9b4..6c446760d0 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/bindings-to-java.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/bindings-to-java.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-default-package.xsl
   - /org/eolang/maven/pre/classes.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/converts-to-java-with-arrays-and-scopes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/converts-to-java-with-arrays-and-scopes.yaml
index 24a5c45efb..28b1fa7709 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/converts-to-java-with-arrays-and-scopes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/converts-to-java-with-arrays-and-scopes.yaml
@@ -2,6 +2,7 @@
 # The aim of this test is to check that entire pipeline with
 # scoped objects works as expected without creating any warnings or errors.
 # Pay attention and to-java.xsl transformations.
+---
 xsls:
   - /org/eolang/parser/errors/not-empty-atoms.xsl
   - /org/eolang/parser/critical-errors/duplicate-names.xsl
@@ -58,10 +59,10 @@ eo: |
   +tests
   +package org.eolang
   +version 0.0.0
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > main
     * 0 (* 1 2) > arr
     eq > @
       * ((arr.at 1).at 1)
-      * 2
\ No newline at end of file
+      * 2
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/data-as-bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/data-as-bytes.yaml
index ebbb112cf2..c82b0023f4 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/data-as-bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/data-as-bytes.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-default-package.xsl
   - /org/eolang/parser/explicit-data.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/dot-home.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/dot-home.yaml
index 4b52b341d6..63b686ed4f 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/dot-home.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/dot-home.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-default-package.xsl
   - /org/eolang/maven/pre/classes.xsl
@@ -13,7 +14,7 @@ eo: |
   [] > foo
     5 > five
     a > @
-  
+
     # This is the default 64+ symbols comment in front of named abstract object.
     [] > a
       # This is the default 64+ symbols comment in front of named abstract object.
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/embedded-class.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/embedded-class.yaml
index e913917635..6fcb8f1040 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/embedded-class.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/embedded-class.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
   - /org/eolang/parser/optimize/globals-to-abstracts.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/locators-to-java.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/locators-to-java.yaml
index 6e0f946bf7..947cbe7fb7 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/locators-to-java.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/locators-to-java.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-default-package.xsl
   - /org/eolang/parser/wrap-method-calls.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/long-class-name.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/long-class-name.yaml
index c47e20812e..525cadd11f 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/long-class-name.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/long-class-name.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-default-package.xsl
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/set-package.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/set-package.yaml
index e99d1c5318..d43fde23ec 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/set-package.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/set-package.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/maven/pre/classes.xsl
   - /org/eolang/maven/pre/package.xsl
@@ -6,7 +7,7 @@ tests:
   - //class[@name='bar' and @package='foo.long-name']
 eo: |
   +package foo.long-name
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > bar
     "hello"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/synthetic-attributes-with-to-java.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/synthetic-attributes-with-to-java.yaml
index 986f113dac..652db1cb40 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/synthetic-attributes-with-to-java.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/synthetic-attributes-with-to-java.yaml
@@ -2,6 +2,7 @@
 # The aim of this test is to check that entire pipeline with
 # scoped objects works as expected without creating  any warnings or errors.
 # Pay attention to to-java.xsl transformations.
+---
 xsls:
   - /org/eolang/parser/errors/not-empty-atoms.xsl
   - /org/eolang/parser/critical-errors/duplicate-names.xsl
@@ -58,10 +59,10 @@ eo: |
   +tests
   +package org.eolang
   +version 0.0.0
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > method
     * 1 (* "one" "two") 3 > res
     eq > @
       * res.length ((res.at 1).at 1)
-      * 3 "two"
\ No newline at end of file
+      * 3 "two"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/test-object-to-java.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/test-object-to-java.yaml
index f395c35332..fd50e4f8fe 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/test-object-to-java.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/test-object-to-java.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-default-package.xsl
   - /org/eolang/maven/pre/classes.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-moving-inside.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-moving-inside.yaml
index 7c11e7263d..1ac553f6ee 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-moving-inside.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-moving-inside.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
   - /org/eolang/maven/pre/classes.xsl
@@ -12,7 +13,7 @@ tests:
   - //o[@base='ω2c' and @name='c']
 eo: |
   +tests
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > a
     # This is the default 64+ symbols comment in front of named abstract object.
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-test.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-test.yaml
index bac6f9b957..f2f6a21983 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-test.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tests-test.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
   - /org/eolang/parser/optimize/globals-to-abstracts.xsl
@@ -17,7 +18,7 @@ tests:
   - //java[contains(text(), '@Test')]
 eo: |
   +tests
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > works
     1.eq 1 > @
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tuple-to-java.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tuple-to-java.yaml
index 81b52b01e5..2afa201c75 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tuple-to-java.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/tuple-to-java.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/stars-to-tuples.xsl
   - /org/eolang/parser/stars-to-tuples.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/underscore-to-java.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/underscore-to-java.yaml
index 74adcd8715..bfb18474ec 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/underscore-to-java.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/underscore-to-java.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-default-package.xsl
   - /org/eolang/maven/pre/classes.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml
index 7ee20bf7e7..9a8ce4191f 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > prints-itself
@@ -23,4 +24,4 @@ phi: |
         )
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml
index 3715fc007d..e0bca74772 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > main /int
@@ -17,4 +18,4 @@ phi: |
         ⟧
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml
index 15305e02b2..adc7d5ac1e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   x > xyz
     y:attr
@@ -20,4 +21,4 @@ phi: |
         )
       )
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml
index e10acece1a..14201536a2 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # The MIT License (MIT)
   #
@@ -132,4 +133,4 @@ phi: |
         λ ⤍ Package
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
index b4e39bac32..2e9f3a7af3 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
@@ -1,10 +1,11 @@
+---
 eo: |
   +architect yegor256@gmail.com
   +home https://github.com/objectionary/eo
   +package org.eolang
   +rt jvm org.eolang:eo-runtime:0.0.0
-  +version 0.0.0 
-  
+  +version 0.0.0
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > bytes
     # This is the default 64+ symbols comment in front of named abstract object.
@@ -133,4 +134,4 @@ phi: |
         λ ⤍ Package
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml
index 0de33611c9..a6400947e5 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml
@@ -1,7 +1,8 @@
+---
 eo: |
   +package foo.bar
   +alias com.yegor256.x
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [y] > main
     x y > z
@@ -21,4 +22,4 @@ phi: |
         λ ⤍ Package
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml
index cd3b21eb2f..5380397b6e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml
@@ -1,3 +1,4 @@
+---
 eo: -- > empty
 phi: |
   {
@@ -6,4 +7,4 @@ phi: |
         Δ ⤍ --
       )
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml
index 2345377fc0..73f847d78d 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [z] > main
@@ -13,4 +14,4 @@ phi: |
         y ↦ Φ.org.eolang.seq
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml
index 6532f578c8..63789d133f 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   +package eo.example
 
@@ -54,4 +55,4 @@ phi: |
         λ ⤍ Package
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml
index 2503a1a41f..a88562b7c0 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   QQ.io.stdout > std
   Q.org.eolang.x > y
@@ -7,4 +8,4 @@ phi: |
       std ↦ Φ.org.eolang.io.stdout,
       y ↦ Φ.org.eolang.x
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml
index 874c3c559e..5ae7fcc1b0 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > iterates-over-simple-counter
@@ -66,4 +67,4 @@ phi: |
         )
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml
index 77609e21e3..8923afa2e7 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   +package org.eolang.benchmark
 
@@ -40,4 +41,4 @@ phi: |
         λ ⤍ Package
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml
index 9936a77e65..d29a488a4b 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml
@@ -1,7 +1,8 @@
+---
 eo: x.y.z > xyz
 phi: |
   {
     ⟦
       xyz ↦ Φ.org.eolang.x.y.z
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml
index 1b9b58899c..f71644df42 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [a] > main
@@ -34,4 +35,4 @@ phi: |
         ⟧
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml
index 03dd38c26b..82bb0be926 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml
@@ -1,3 +1,4 @@
+---
 eo: A2- > bts
 phi: |
   {
@@ -6,4 +7,4 @@ phi: |
         Δ ⤍ A2-
       )
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml
index bd86ec76fa..b3a5e8a788 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml
@@ -1,6 +1,7 @@
+---
 eo: |
   +package foo.bar.baz
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > main
     stdout > @
@@ -20,4 +21,4 @@ phi: |
         λ ⤍ Package
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml
index a4d7699bc3..c0d21eae84 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # Test.
   [] > compiles-correctly-with-long-duplicate-names
@@ -28,4 +29,4 @@ phi: |
         φ ↦ Φ.org.eolang.true
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml
index c44f6a0c82..f4d5a28b36 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > main
@@ -15,4 +16,4 @@ phi: |
         phi ↦ ξ.φ.φ
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml
index 808265da0e..2136a24232 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of abstract object.
   [] > test
@@ -14,4 +15,4 @@ phi: |
         )
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml
index 3d78f64aa0..0b68a8c5ed 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml
@@ -1,3 +1,4 @@
+---
 eo: 5 > five
 phi: |
   {
@@ -8,4 +9,4 @@ phi: |
         )
       )
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml
index 1dbe72e12b..fffd4d16d5 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml
@@ -1,3 +1,4 @@
+---
 eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [a b] > c
@@ -11,4 +12,4 @@ phi: |
         φ ↦ Φ.org.eolang.d
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/pre/pre-data.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/pre/pre-data.yaml
index 42179431de..030e561779 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/pre/pre-data.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/pre/pre-data.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/pre/data.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/bytes.yaml
index d436798dfb..2de1281b2c 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/bytes.yaml
@@ -1,6 +1,7 @@
+---
 origin: |
   EA-EA-EA-EA > xs
-  
+
   01- > one
 
   "hello" > ys
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/compares-bool-to-bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/compares-bool-to-bytes.yaml
index a2bbf266bc..ebab3e9edd 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/compares-bool-to-bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/compares-bool-to-bytes.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # Test.
   [] > compares-bool-to-bytes
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/dataless.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/dataless.yaml
index 9c167eb11a..5ae39886d2 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/dataless.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/dataless.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   +package sandbox
 
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-bytes.yaml
index 2a6decade7..45ebf17c83 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-bytes.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   -- > empty
 
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-string.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-string.yaml
index 03e2fba92f..483a456a9a 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-string.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/empty-string.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > app
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/idiomatic.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/idiomatic.yaml
index 8395096196..d9b1d80d40 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/idiomatic.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/idiomatic.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the license part
   # of the program
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/inheritance.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/inheritance.yaml
index e5102a8be6..1219b9065a 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/inheritance.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/inheritance.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   +package sandbox
   +alias stdout org.eolang.io.stdout
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/just-float.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/just-float.yaml
index f6171ca491..be30e8b5a4 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/just-float.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/just-float.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   3.14 > pi
   # This is the default 64+ symbols comment in front of named abstract object.
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/multiline-string.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/multiline-string.yaml
index 3018c95b9c..6bb41d5280 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/multiline-string.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/multiline-string.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > app
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/stars-tuples.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/stars-tuples.yaml
index 02c9616a74..bd32637c8d 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/stars-tuples.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/stars-tuples.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   * 1 "Hello" x > array
 
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/times.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/times.yaml
index 330a6dbbd0..ea0f54060e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/times.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/print/samples/times.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > app
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/add-loc-to-objects.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/add-loc-to-objects.yaml
index 7c8a6983ea..881f838a84 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/add-loc-to-objects.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/add-loc-to-objects.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/add-loc-to-objects.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/append-xi.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/append-xi.yaml
index dd5be586b9..0386805d84 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/append-xi.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/append-xi.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/append-xi.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-and-sigma.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-and-sigma.yaml
index 5fcaa6a678..0fd7b7e68c 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-and-sigma.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-and-sigma.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/bind-rho.xsl
   - /org/eolang/maven/sodg/bind-sigma.xsl
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-to-abstract.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-to-abstract.yaml
index 30a7e2f291..367e8a47c8 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-to-abstract.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/bind-rho-to-abstract.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/bind-rho.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots-to-copy.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots-to-copy.yaml
index 61acdd303a..e718d37712 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots-to-copy.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots-to-copy.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/connect-dots.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots.yaml
index ee6b110715..3b1a8dbc75 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/connect-dots.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/connect-dots.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/epsilons.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/epsilons.yaml
index d90dadfd31..dde52e5c30 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/epsilons.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/epsilons.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/epsilon-bindings.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/focus.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/focus.yaml
index 969072f576..c9ca87d8f7 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/focus.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/focus.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/focus.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-attrs.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-attrs.yaml
index 044f749088..1fd2577caf 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-attrs.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-attrs.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg-to/normalize-attrs.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-names.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-names.yaml
index ecf6ee128f..34f2c834cf 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-names.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/normalize-names.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg-to/normalize-names.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/pi-copies.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/pi-copies.yaml
index d7742714d7..9f38081dcc 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/pi-copies.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/pi-copies.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/pi-copies.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-atoms.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-atoms.yaml
index 84869aa7ed..be2ae92f44 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-atoms.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-atoms.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/put-atoms.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-data.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-data.yaml
index 392e018054..baac9d1230 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-data.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/put-data.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/put-data.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/to-text.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/to-text.yaml
index b3b06d126e..deb46e5a68 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/to-text.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/to-text.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg-to/to-text.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/touch-all.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/touch-all.yaml
index a62952b6b9..79b1979401 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/touch-all.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/touch-all.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/touch-all.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-refs.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-refs.yaml
index 06fd0e7ad2..5ff4aac412 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-refs.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-refs.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/unroll-refs.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-with-args.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-with-args.yaml
index c9ffa97c5b..a46a31bcdf 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-with-args.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodg-packs/unroll-with-args.yaml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/maven/sodg/unroll-refs.xsl
 document:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/abstracts.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/abstracts.yaml
index bd555c021a..e20f5303ed 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/abstracts.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/abstracts.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .org .eolang .int
   - .foo .bar .a .x .α0 .α0 .Δ δ=00-00-00-00-00-00-00-2A
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/arrays.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/arrays.yaml
index 7fff0be674..0aff55258e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/arrays.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/arrays.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .org .eolang .test
   - .org .eolang .int
@@ -12,4 +13,3 @@ eo: |
     * > z
       test
       * 42 43
-
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/atoms.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/atoms.yaml
index 6fe98ffd1d..9f5bdbe8a9 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/atoms.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/atoms.yaml
@@ -1,9 +1,10 @@
+---
 locators:
   - .foo .boom .λ τ=foo.boom
   - .foo .hello$alpha .λ τ=foo.hello$alpha
 eo: |
   +package foo
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > hello
     # This is the default 64+ symbols comment in front of named abstract object.
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-abstract.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-abstract.yaml
index 07aedc0c0d..90826d4b52 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-abstract.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-abstract.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .foo .a .π
   - .foo .b .α0
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-argument.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-argument.yaml
index e693e20fcb..cd5c474359 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-argument.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/copy-of-argument.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .foo .bar .ρ .f
   - .foo .f .ρ .bar
@@ -9,4 +10,3 @@ eo: |
     x > bar
       []
         f 1 > a
-
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/data.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/data.yaml
index 65bd86dea5..21f198674f 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/data.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/data.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .data .f .α0 .Δ δ=40-09-21-FB-4D-12-D8-4A
   - .data .f .π >float
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dot-on-ref.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dot-on-ref.yaml
index f92d3cae34..58f8bcb910 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dot-on-ref.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dot-on-ref.yaml
@@ -1,10 +1,11 @@
+---
 locators:
   - .foo .a .b .ε .x
   - .foo .a .b .ε .φ .ε .ρ
   - .foo .a .b .ε .φ .ε .β .test .ε >x .ρ .ρ >a
 eo: |
   +package foo
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > a
     # This is the default 64+ symbols comment in front of named abstract object.
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dots.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dots.yaml
index eedc4481d8..e68faa2983 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dots.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/dots.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .org .eolang .true
   - .org .eolang .true !.not
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/inclusions.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/inclusions.yaml
index 9e539e939a..5c87fd8944 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/inclusions.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/inclusions.yaml
@@ -1,3 +1,4 @@
+---
 inclusion:
   - foo.x.*
 locators:
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/metas.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/metas.yaml
index c2fb9d1716..0353a29914 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/metas.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/metas.yaml
@@ -1,9 +1,10 @@
+---
 locators:
   - .+version
   - .+time
 eo: |
   +package foo.bar
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [x] > test
     42 > y
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/nested-anonymous.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/nested-anonymous.yaml
index f4a2c517c5..84aa9e1e09 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/nested-anonymous.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/nested-anonymous.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .a .x .π
   - .a .x .α0 .ε .φ .ε .ρ .t
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/refs.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/refs.yaml
index e3d53e4dd6..1508e4d1f1 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/refs.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/refs.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .refs .x .ε
   - .org .eolang .true
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/rho.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/rho.yaml
index ffd6d54ddb..17004ec4d0 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/rho.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/rho.yaml
@@ -1,8 +1,9 @@
+---
 locators:
   - .foo .bar .a .b .ε .c .ε .β .ρ .ξ .ρ
 eo: |
   +package foo.bar
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > a
     # This is the default 64+ symbols comment in front of named abstract object.
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/simple.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/simple.yaml
index 3b92a60881..e3b7b048f1 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/simple.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/simple.yaml
@@ -1,3 +1,4 @@
+---
 locators:
   - .org .eolang .int
   - .org .eolang .true
@@ -12,7 +13,7 @@ eo: |
   +alias foo
   +alias bar
   +alias boom
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > simple
     foo > @
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/vars.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/vars.yaml
index 312480bfe5..a12160922a 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/vars.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/sodgs/vars.yaml
@@ -1,10 +1,11 @@
+---
 locators:
   - .foo .x .a .π
   - .foo .x .y .ε .b .π
   - .foo .x .y .ε .z .ε .c .ε .β .a .ε .β .ρ .ε .β .ρ .ξ .d
 eo: |
   +package foo
-  
+
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > x
     42 > a
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/atoms.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/atoms.yaml
index 198560d7b8..817f7b358c 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/atoms.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/atoms.yaml
@@ -1,6 +1,7 @@
+---
 tests:
   - /program/objects/o[@name='main' and @atom and @abstract]
   - /program/objects/o[@name='outer' and @abstract]
   - /program/objects/o[@name='outer' and @abstract]/o[@name='inner' and @atom and @abstract]
 phi:
-  "{⟦main ↦ ⟦λ ⤍ Lambda⟧, outer ↦ ⟦inner ↦ ⟦λ ⤍ Lambda⟧⟧⟧}"
\ No newline at end of file
+  "{⟦main ↦ ⟦λ ⤍ Lambda⟧, outer ↦ ⟦inner ↦ ⟦λ ⤍ Lambda⟧⟧⟧}"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml
index a268c8cd51..265acfb514 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/objects/o[@base='Q']
   - /program/objects/o[@method and @base='.org']
@@ -38,4 +39,4 @@ phi: |
         )
       )
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml
index eac26039f9..64c7de125d 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - //errors[count(error)=0]
 phi: |
@@ -746,4 +747,4 @@ phi: |
         λ ⤍ Package
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/empty-bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/empty-bytes.yaml
index f03b362497..07c2ba5637 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/empty-bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/empty-bytes.yaml
@@ -1,7 +1,8 @@
+---
 tests:
   - /program/objects/o[@base='Q']
   - /program/objects/o[@base='.org' and @method]
   - /program/objects/o[@base='.eolang' and @method]
   - /program/objects/o[@base='.bytes' and @method and @name='empty']
   - /program/objects/o[@base='.bytes' and @method and @name='empty' and o[@base='org.eolang.bytes' and not(text())]]
-phi: "{⟦empty ↦ Φ.org.eolang.bytes(Δ ⤍ --)⟧}"
\ No newline at end of file
+phi: "{⟦empty ↦ Φ.org.eolang.bytes(Δ ⤍ --)⟧}"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml
index 12131095ad..f1c7356143 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - //o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name']]]]]
 phi: |
@@ -20,4 +21,4 @@ phi: |
         )
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml
index d1762a6b88..7884246977 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/objects/o[@name='main' and @abstract and o[@name='x']]
 phi: |
@@ -7,4 +8,4 @@ phi: |
         x ↦ ξ.y
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/normalized.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/normalized.yaml
index 8126da32e7..01e674f28d 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/normalized.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/normalized.yaml
@@ -1,4 +1,5 @@
+---
 tests:
   - /program/objects[count(o)=1]/o[@name='app']
 phi:
-  "{ ⟦ app ↦ ⟦ args ↦ ∅, φ ↦ Φ.org.eolang.io.stdout (α0 ↦ Φ.org.eolang.string (α0 ↦ Φ.org.eolang.bytes (Δ ⤍ 48-65-6C-6C-6F-2C-20-77-6F-72-6C-64-21-0A))) ⟧ ⟧ }"
\ No newline at end of file
+  "{ ⟦ app ↦ ⟦ args ↦ ∅, φ ↦ Φ.org.eolang.io.stdout (α0 ↦ Φ.org.eolang.string (α0 ↦ Φ.org.eolang.bytes (Δ ⤍ 48-65-6C-6C-6F-2C-20-77-6F-72-6C-64-21-0A))) ⟧ ⟧ }"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/one-byte.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/one-byte.yaml
index 7891cb3682..d2beb11d8e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/one-byte.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/one-byte.yaml
@@ -1,6 +1,7 @@
+---
 tests:
   - /program/objects/o[@base='Q']
   - /program/objects/o[@base='.org' and @method]
   - /program/objects/o[@base='.eolang' and @method]
   - /program/objects/o[@base='.bytes' and @method and @name='bts' and o[@base='org.eolang.bytes' and text()='A2']]
-phi: "{⟦bts ↦ Φ.org.eolang.bytes(Δ ⤍ A2-)⟧}"
\ No newline at end of file
+phi: "{⟦bts ↦ Φ.org.eolang.bytes(Δ ⤍ A2-)⟧}"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/package.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/package.yaml
index c2c964c507..dcefda54f3 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/package.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/package.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/metas/meta[head[text()='package'] and tail[text()='foo.bar.baz'] and part[text()='foo.bar.baz']]
   - /program/objects/o[@abstract and @name='main']
@@ -5,4 +6,4 @@ tests:
   - /program/objects/o[@abstract and @name='main']/o[@base='.org' and @method]
   - /program/objects/o[@abstract and @name='main']/o[@base='.eolang' and @method]
   - /program/objects/o[@abstract and @name='main']/o[@base='.stdout' and @method and @name='@']
-phi: "{⟦foo ↦ ⟦bar ↦ ⟦baz ↦ ⟦main ↦ ⟦φ ↦ Φ.org.eolang.stdout⟧, λ ⤍ Package⟧, λ ⤍ Package⟧, λ ⤍ Package⟧⟧}"
\ No newline at end of file
+phi: "{⟦foo ↦ ⟦bar ↦ ⟦baz ↦ ⟦main ↦ ⟦φ ↦ Φ.org.eolang.stdout⟧, λ ⤍ Package⟧, λ ⤍ Package⟧, λ ⤍ Package⟧⟧}"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/spaces.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/spaces.yaml
index 402f00afe5..f07188f9a3 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/spaces.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/spaces.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/objects/o[@name='main' and @abstract and o[@name='x']]
-phi: "{⟦main   ↦ ⟦ x ↦ ξ.y  ⟧   ⟧   } "
\ No newline at end of file
+phi: "{⟦main   ↦ ⟦ x ↦ ξ.y  ⟧   ⟧   } "
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/specials.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/specials.yaml
index 8f5a258997..c6ab3ada0d 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/specials.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/specials.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/objects/o[@name='main']
   - /program/objects/o[@name='main']/o[@base='$']/following-sibling::o[@base='.^' and @method]/following-sibling::o[@base='.x' and @method and @name='x']
@@ -17,4 +18,4 @@ eo: |
     y.& > h
     $.a > a
     @.@ > phi
-phi: "{⟦main ↦ ⟦x ↦ ξ.ρ.x, h ↦ Φ.org.eolang.y.σ, a ↦ ξ.ρ.a, phi ↦ ξ.φ.φ⟧⟧}"
\ No newline at end of file
+phi: "{⟦main ↦ ⟦x ↦ ξ.ρ.x, h ↦ Φ.org.eolang.y.σ, a ↦ ξ.ρ.a, phi ↦ ξ.φ.φ⟧⟧}"
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml
index 3b36045306..8f46bb295f 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - //o[@name='test' and count(o)=2]
   - //o[@name='test']/o[position()=1 and @abstract and not(@name)]
@@ -11,4 +12,4 @@ phi: |
         )
       ⟧
     ⟧
-  }
\ No newline at end of file
+  }
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-data.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-data.yaml
index 8183040e7f..344dcecd86 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-data.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-data.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/objects/o[@base='Q']
   - /program/objects/o[@base='.org' and @method]
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml
index aabbfeb118..d50103449e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml
@@ -1,8 +1,9 @@
+---
 tests:
   - /program/objects/o[@name='main' and @abstract and o[@name='x']]
 phi: |
   Φ ↦ ⟦
     main ↦ ⟦
       x ↦ ξ.y
-    ⟧ 
-  ⟧
\ No newline at end of file
+    ⟧
+  ⟧

From 7ee9ebc1510180155de6572e0f8291bb7f9e698d Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sun, 21 Apr 2024 16:23:58 +0300
Subject: [PATCH 5/8] fix(objectionary#3035): fix ./eo-parser yaml linting
 errors and warnings

---
 .../resources/org/eolang/parser/packs/add-locators.yaml    | 3 ++-
 .../test/resources/org/eolang/parser/packs/add-probes.yaml | 1 +
 .../org/eolang/parser/packs/add-versioned-probes.yaml      | 1 +
 .../org/eolang/parser/packs/adds-default-package.yaml      | 1 +
 .../test/resources/org/eolang/parser/packs/adds-refs.yaml  | 1 +
 .../resources/org/eolang/parser/packs/all-data-types.yaml  | 3 ++-
 .../resources/org/eolang/parser/packs/broken-refs.yaml     | 3 ++-
 .../parser/packs/catches/catches-abstract-decoratee.yaml   | 1 +
 .../parser/packs/catches/catches-alias-duplicates.yaml     | 1 +
 .../parser/packs/catches/catches-atoms-without-rt.yaml     | 1 +
 .../parser/packs/catches/catches-broken-aliases.yaml       | 1 +
 .../catches/catches-comment-format-without-tests.yaml      | 3 ++-
 .../parser/packs/catches/catches-duplicate-metas.yaml      | 1 +
 .../parser/packs/catches/catches-duplicate-names.yaml      | 1 +
 .../parser/packs/catches/catches-empty-package-meta.yaml   | 1 +
 .../packs/catches/catches-external-weak-typed-atoms.yaml   | 1 +
 .../parser/packs/catches/catches-global-nonames.yaml       | 3 ++-
 .../parser/packs/catches/catches-incorrect-architect.yaml  | 1 +
 .../parser/packs/catches/catches-incorrect-home.yaml       | 3 ++-
 .../parser/packs/catches/catches-incorrect-version.yaml    | 1 +
 .../parser/packs/catches/catches-mandatory-home-meta.yaml  | 1 +
 .../packs/catches/catches-mandatory-package-meta.yaml      | 1 +
 .../packs/catches/catches-mandatory-version-meta.yaml      | 1 +
 .../parser/packs/catches/catches-many-free-attrs.yaml      | 1 +
 .../parser/packs/catches/catches-metas-unsorted.yaml       | 1 +
 .../parser/packs/catches/catches-name-duplicates.yaml      | 1 +
 .../eolang/parser/packs/catches/catches-noname-attrs.yaml  | 1 +
 .../parser/packs/catches/catches-not-one-home-meta.yaml    | 1 +
 .../parser/packs/catches/catches-not-one-package-meta.yaml | 1 +
 .../parser/packs/catches/catches-not-one-version-meta.yaml | 1 +
 .../parser/packs/catches/catches-only-name-duplicates.yaml | 3 ++-
 .../parser/packs/catches/catches-prohibited-package.yaml   | 3 ++-
 .../parser/packs/catches/catches-rt-without-atoms.yaml     | 1 +
 .../catches/catches-self-naming-with-method-and-this.yaml  | 1 +
 .../packs/catches/catches-self-naming-with-method.yaml     | 1 +
 .../packs/catches/catches-self-naming-with-this.yaml       | 1 +
 .../eolang/parser/packs/catches/catches-self-naming.yaml   | 1 +
 .../parser/packs/catches/catches-signed-binding-index.yaml | 1 +
 .../parser/packs/catches/catches-sparse-decoration.yaml    | 3 ++-
 .../packs/catches/catches-unit-test-without-phi.yaml       | 1 +
 .../eolang/parser/packs/catches/catches-unknown-names.yaml | 1 +
 .../parser/packs/catches/catches-unused-aliases.yaml       | 1 +
 .../org/eolang/parser/packs/const-to-dataized.yaml         | 1 +
 .../org/eolang/parser/packs/cti/cti-adds-error.yaml        | 3 ++-
 .../org/eolang/parser/packs/cti/cti-adds-warning.yaml      | 3 ++-
 .../resources/org/eolang/parser/packs/empty-vs-free.yaml   | 3 ++-
 .../test/resources/org/eolang/parser/packs/expand-qqs.yaml | 3 ++-
 .../resources/org/eolang/parser/packs/expands-aliases.yaml | 3 ++-
 .../resources/org/eolang/parser/packs/explicit-data.yaml   | 1 +
 .../org/eolang/parser/packs/float-up-same-attrs.yaml       | 1 +
 .../eolang/parser/packs/float-vars-with-pre-methods.yaml   | 1 +
 .../test/resources/org/eolang/parser/packs/float-vars.yaml | 3 ++-
 .../resources/org/eolang/parser/packs/full-syntax.yaml     | 5 +++--
 .../resources/org/eolang/parser/packs/has-comment.yaml     | 3 ++-
 .../test/resources/org/eolang/parser/packs/leap-year.yaml  | 1 +
 .../resources/org/eolang/parser/packs/line-numbers.yaml    | 3 ++-
 .../resources/org/eolang/parser/packs/onlyphi-bound.yaml   | 3 ++-
 .../parser/packs/optimize/fix-names-with-duplicates.yaml   | 3 ++-
 .../org/eolang/parser/packs/optimize/fixes-globals.yaml    | 1 +
 .../org/eolang/parser/packs/optimize/float-abstracts.yaml  | 1 +
 .../eolang/parser/packs/optimize/float-and-keep-names.yaml | 1 +
 .../parser/packs/optimize/float-nested-anonymous.yaml      | 3 ++-
 .../parser/packs/optimize/floating-sets-parent-names.yaml  | 1 +
 .../org/eolang/parser/packs/optimize/multi-anonymous.yaml  | 1 +
 .../eolang/parser/packs/optimize/not-redundant-levels.yaml | 1 +
 ...dundant-levels-with-arguments-and-abstract-parents.yaml | 3 ++-
 .../redundant-levels-with-arguments-and-siblings.yaml      | 3 ++-
 .../packs/optimize/redundant-levels-with-arrays.yaml       | 3 ++-
 .../packs/optimize/redundant-levels-with-siblings.yaml     | 3 ++-
 .../org/eolang/parser/packs/optimize/redundant-levels.yaml | 3 ++-
 .../resources/org/eolang/parser/packs/parsed-data.yaml     | 1 +
 .../org/eolang/parser/packs/preserves-spaces.yaml          | 1 +
 .../eolang/parser/packs/priority/additional-brackets.yaml  | 3 ++-
 .../org/eolang/parser/packs/priority/space-between.yaml    | 1 +
 .../test/resources/org/eolang/parser/packs/recursion.yaml  | 3 ++-
 .../org/eolang/parser/packs/resolves-aliases.yaml          | 1 +
 .../org/eolang/parser/packs/scope-before-method.yaml       | 5 +++--
 .../org/eolang/parser/packs/scopes-double-scope.yaml       | 3 ++-
 .../resources/org/eolang/parser/packs/scopes-nested.yaml   | 5 +++--
 .../eolang/parser/packs/scopes-with-doubled-methods.yaml   | 3 ++-
 .../eolang/parser/packs/scopes-with-nested-methods.yaml    | 1 +
 .../src/test/resources/org/eolang/parser/packs/scopes.yaml | 5 +++--
 .../org/eolang/parser/packs/self-naming-no-catch.yaml      | 1 +
 .../src/test/resources/org/eolang/parser/packs/simple.yaml | 5 +++--
 .../org/eolang/parser/packs/syntax/anonymous-more.yaml     | 1 +
 .../org/eolang/parser/packs/syntax/anonymous.yaml          | 3 ++-
 .../eolang/parser/packs/syntax/bool-tests-straight.yaml    | 5 +++--
 .../parser/packs/syntax/bound-reversed-application.yaml    | 5 +++--
 .../org/eolang/parser/packs/syntax/escape-sequences.yaml   | 4 ++--
 .../resources/org/eolang/parser/packs/syntax/numbers.yaml  | 3 ++-
 .../org/eolang/parser/packs/syntax/post-method.yaml        | 3 ++-
 .../org/eolang/parser/packs/syntax/pre-method.yaml         | 3 ++-
 .../eolang/parser/packs/syntax/redundant-parentheses.yaml  | 3 ++-
 .../org/eolang/parser/packs/syntax/text-block.yaml         | 3 ++-
 .../resources/org/eolang/parser/packs/syntax/tuples.yaml   | 1 +
 .../resources/org/eolang/parser/packs/syntax/versions.yaml | 3 ++-
 .../packs/syntax/vertical-methods-in-application.yaml      | 3 ++-
 .../parser/packs/syntax/vmethod-after-formation.yaml       | 5 +++--
 .../test/resources/org/eolang/parser/packs/unicode.yaml    | 3 ++-
 .../resources/org/eolang/parser/packs/wraps-methods.yaml   | 1 +
 .../test/resources/org/eolang/parser/samples/bytes.yaml    | 1 +
 .../test/resources/org/eolang/parser/samples/dataless.yaml | 1 +
 .../resources/org/eolang/parser/samples/empty-bytes.yaml   | 1 +
 .../resources/org/eolang/parser/samples/empty-string.yaml  | 1 +
 .../resources/org/eolang/parser/samples/idiomatic.yaml     | 1 +
 .../resources/org/eolang/parser/samples/inheritance.yaml   | 1 +
 .../org/eolang/parser/samples/inner-formation.yaml         | 1 +
 .../resources/org/eolang/parser/samples/just-float.yaml    | 1 +
 .../org/eolang/parser/samples/multiline-string.yaml        | 1 +
 .../org/eolang/parser/samples/same-name-inners.yaml        | 1 +
 .../resources/org/eolang/parser/samples/stars-tuples.yaml  | 1 +
 .../test/resources/org/eolang/parser/samples/times.yaml    | 1 +
 .../org/eolang/parser/typos/binding-with-rho.yaml          | 1 +
 .../resources/org/eolang/parser/typos/broken-head.yaml     | 1 +
 .../org/eolang/parser/typos/comment-in-method.yaml         | 1 +
 .../org/eolang/parser/typos/double-empty-lines.yaml        | 5 +++--
 .../eolang/parser/typos/double-root-inside-locator.yaml    | 1 +
 .../eolang/parser/typos/empty-line-before-application.yaml | 1 +
 .../parser/typos/empty-line-before-first-object.yaml       | 1 +
 .../eolang/parser/typos/empty-line-before-method-2.yaml    | 7 ++++---
 .../org/eolang/parser/typos/empty-line-before-method.yaml  | 1 +
 .../eolang/parser/typos/empty-line-before-ref-deep.yaml    | 1 +
 .../org/eolang/parser/typos/empty-line-before-ref.yaml     | 1 +
 .../org/eolang/parser/typos/empty-line-between-metas.yaml  | 5 +++--
 .../parser/typos/empty-line-in-vertical-application.yaml   | 1 +
 .../resources/org/eolang/parser/typos/empty-object.yaml    | 1 +
 .../org/eolang/parser/typos/hmethod-after-vmethod.yaml     | 3 ++-
 .../org/eolang/parser/typos/invalid-int-literal.yaml       | 1 +
 .../resources/org/eolang/parser/typos/long-character.yaml  | 1 +
 .../parser/typos/missing-empty-line-after-metas.yaml       | 1 +
 .../resources/org/eolang/parser/typos/not-empty-atoms.yaml | 1 +
 .../org/eolang/parser/typos/one-space-indent.yaml          | 1 +
 .../parser/typos/redundant-parentheses/extra-braces-1.yaml | 3 ++-
 .../parser/typos/redundant-parentheses/extra-braces-2.yaml | 3 ++-
 .../parser/typos/redundant-parentheses/extra-braces-3.yaml | 3 ++-
 .../parser/typos/redundant-parentheses/extra-braces-4.yaml | 3 ++-
 .../parser/typos/redundant-parentheses/extra-braces-5.yaml | 3 ++-
 .../parser/typos/redundant-parentheses/extra-braces-6.yaml | 3 ++-
 .../parser/typos/redundant-parentheses/just-number.yaml    | 3 ++-
 .../typos/redundant-parentheses/negative-numbers.yaml      | 3 ++-
 .../eolang/parser/typos/redundant-parentheses/numbers.yaml | 1 +
 .../redundant-parentheses/simple-application-named.yaml    | 1 +
 .../typos/redundant-parentheses/simple-application.yaml    | 1 +
 .../org/eolang/parser/typos/redundent-parenheses.yaml      | 1 +
 .../eolang/parser/typos/reversed-as-separate-argument.yaml | 1 +
 .../org/eolang/parser/typos/root-inside-locator.yaml       | 1 +
 .../parser/typos/scoped-application-after-suffix.yaml      | 3 ++-
 .../resources/org/eolang/parser/typos/space-in-naming.yaml | 1 +
 .../resources/org/eolang/parser/typos/space-in-tail.yaml   | 1 +
 .../org/eolang/parser/typos/suffix-with-dots.yaml          | 1 +
 .../org/eolang/parser/typos/too-far-right-indent.yaml      | 1 +
 .../org/eolang/parser/typos/trailing-space-in-comment.yaml | 2 ++
 .../resources/org/eolang/parser/typos/varargs-inside.yaml  | 1 +
 .../parser/typos/version-with-inline-application.yaml      | 1 +
 .../typos/vertical-method-in-horizontal-application.yaml   | 3 ++-
 .../org/eolang/parser/typos/vertical-method-in-scope.yaml  | 3 ++-
 .../eolang/parser/typos/vmethod-after-happlication.yaml    | 3 ++-
 .../org/eolang/parser/typos/vmethod-after-hmethod.yaml     | 3 ++-
 .../org/eolang/parser/typos/xi-inside-locator.yaml         | 1 +
 .../resources/org/eolang/parser/xax/add-locs-with-dot.yml  | 1 +
 .../src/test/resources/org/eolang/parser/xax/add-locs.yml  | 1 +
 .../src/test/resources/org/eolang/parser/xax/add-refs.yml  | 1 +
 .../org/eolang/parser/xax/zero-version-correct.yml         | 1 +
 .../eolang/parser/xax/zero-version-incorrect-for-main.yml  | 1 +
 .../eolang/parser/xax/zero-version-incorrect-for-test.yml  | 1 +
 .../org/eolang/parser/xax/zero-version-no-version.yml      | 1 +
 .../parser/xax/zero-version-not-applicable-source.yml      | 1 +
 167 files changed, 244 insertions(+), 77 deletions(-)

diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml
index fde8d21a66..ff859aa42d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/errors[count(error)=0]
   - //o[@name='a' and @loc='Φ.org.abc.a']
@@ -36,5 +37,5 @@ eo: |
       6.2
     [e]
       e.hello > @
-  
+
   $.&.^.p > q
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml
index ecb7f0a607..a4957388e2 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/errors[count(error)=0]
   - /program/sheets/sheet[contains(text(),'add-probes')]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/add-versioned-probes.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/add-versioned-probes.yaml
index c581535ddc..9c270dbffd 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/add-versioned-probes.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/add-versioned-probes.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
   - /org/eolang/parser/expand-qqs.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/adds-default-package.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/adds-default-package.yaml
index f49ae8328b..5dbceacc7d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/adds-default-package.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/adds-default-package.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-refs.xsl
   - /org/eolang/parser/expand-aliases.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/adds-refs.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/adds-refs.yaml
index 903479fb86..d7ae30fded 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/adds-refs.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/adds-refs.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/critical-errors/duplicate-names.xsl
   - /org/eolang/parser/errors/self-naming.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/all-data-types.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/all-data-types.yaml
index 7610aa93aa..0eb089c016 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/all-data-types.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/all-data-types.yaml
@@ -1,3 +1,4 @@
+---
 xsls: [ ]
 tests:
   - /program/errors[count(*)=0]
@@ -19,7 +20,7 @@ tests:
   - //o[@base='string' and @name='textX' and @data]
 eo: |
   +package test
-  
+
   01- > bytesX
 
   00-02-4F-1A-FF-01 > bytesX
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/broken-refs.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/broken-refs.yaml
index 80d8a90f10..9d36784672 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/broken-refs.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/broken-refs.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-refs.xsl
   - /org/eolang/parser/errors/broken-refs.xsl
@@ -9,4 +10,4 @@ eo: |
   # This is the default 64+ symbols comment in front of abstract object.
   [] > app
     42 > a
-    a.plus 1 > @
\ No newline at end of file
+    a.plus 1 > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-abstract-decoratee.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-abstract-decoratee.yaml
index 6ae4a83209..8eb127fc10 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-abstract-decoratee.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-abstract-decoratee.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/abstract-decoratee.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-alias-duplicates.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-alias-duplicates.yaml
index ca44664bde..286877b2dc 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-alias-duplicates.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-alias-duplicates.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/duplicate-aliases.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-atoms-without-rt.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-atoms-without-rt.yaml
index 090505622f..ad7fa5945f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-atoms-without-rt.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-atoms-without-rt.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/rt-and-atoms.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-broken-aliases.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-broken-aliases.yaml
index b03aadd66d..de017cefb4 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-broken-aliases.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-broken-aliases.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/broken-aliases.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-comment-format-without-tests.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-comment-format-without-tests.yaml
index a9f1e95aa4..b131f3519a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-comment-format-without-tests.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-comment-format-without-tests.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/errors[count(error)=0]
 eo: |
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-metas.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-metas.yaml
index 09b32e006e..0bd0ef57dd 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-metas.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-metas.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/duplicate-metas.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-names.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-names.yaml
index 95963ce03a..e555e899ad 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-names.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-duplicate-names.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/critical-errors/duplicate-names.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-empty-package-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-empty-package-meta.yaml
index 10cece60c3..c9a77131c3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-empty-package-meta.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-empty-package-meta.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/correct-package-meta.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-external-weak-typed-atoms.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-external-weak-typed-atoms.yaml
index 3c3660851c..efc18d7180 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-external-weak-typed-atoms.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-external-weak-typed-atoms.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/external-weak-typed-atoms.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-global-nonames.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-global-nonames.yaml
index 3398c2f59d..5933103216 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-global-nonames.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-global-nonames.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/global-nonames.xsl
 tests:
@@ -7,5 +8,5 @@ eo: |
   3.14 > pi
 
   fake
-  
+
   a.b > good
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-architect.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-architect.yaml
index 6c2e1866ac..e7a02d19c3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-architect.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-architect.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/incorrect-architect.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-home.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-home.yaml
index 398889846a..03f7036d6c 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-home.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-home.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/incorrect-home.xsl
 tests:
@@ -12,7 +13,7 @@ eo: |
   +home www.something.com
   +alias org.eolang.io.stdout
   +home https://|http/wrong.com
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [x] > foo
     x.div in.nextInt > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-version.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-version.yaml
index 0f244840cc..51d96fc22e 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-version.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-version.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/incorrect-version.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-home-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-home-meta.yaml
index 866ab113c4..5856006057 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-home-meta.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-home-meta.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/mandatory-home-meta.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-package-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-package-meta.yaml
index cea077acdc..c882de669b 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-package-meta.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-package-meta.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/mandatory-package-meta.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-version-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-version-meta.yaml
index 2c4f8aaeb5..b790bcd1ad 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-version-meta.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-version-meta.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/mandatory-version-meta.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-many-free-attrs.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-many-free-attrs.yaml
index ab23d80e8a..d741435364 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-many-free-attrs.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-many-free-attrs.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/many-free-attributes.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-metas-unsorted.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-metas-unsorted.yaml
index 7706cb3185..8422971cb7 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-metas-unsorted.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-metas-unsorted.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/unsorted-metas.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-name-duplicates.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-name-duplicates.yaml
index 3d65a6e499..11ac4af963 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-name-duplicates.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-name-duplicates.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/critical-errors/duplicate-names.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-noname-attrs.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-noname-attrs.yaml
index 64184d579f..28a1305101 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-noname-attrs.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-noname-attrs.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
   - /org/eolang/parser/errors/noname-attributes.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-home-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-home-meta.yaml
index bedc5f4349..25a5a6f011 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-home-meta.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-home-meta.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/mandatory-home-meta.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-package-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-package-meta.yaml
index d235a9ec64..24b3e23bf3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-package-meta.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-package-meta.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/mandatory-package-meta.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-version-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-version-meta.yaml
index 735a497e02..4fb37c4516 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-version-meta.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-version-meta.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/mandatory-version-meta.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-only-name-duplicates.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-only-name-duplicates.yaml
index 0ede7ab149..4178f5608f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-only-name-duplicates.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-only-name-duplicates.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/critical-errors/duplicate-names.xsl
   - /org/eolang/parser/errors/duplicate-aliases.xsl
@@ -17,4 +18,4 @@ eo: |
   [x] > foo
     stdout > @
       sprintf
-        "Hello"
\ No newline at end of file
+        "Hello"
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-prohibited-package.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-prohibited-package.yaml
index 75c820b893..57ae13aa54 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-prohibited-package.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-prohibited-package.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/prohibited-package.xsl
 tests:
@@ -7,4 +8,4 @@ eo: |
   +package org.eolang
 
   # This is the default 64+ symbols comment in front of abstract object.
-  [] > main
\ No newline at end of file
+  [] > main
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-rt-without-atoms.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-rt-without-atoms.yaml
index 4cc5cd8735..94b500cbf4 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-rt-without-atoms.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-rt-without-atoms.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/rt-and-atoms.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method-and-this.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method-and-this.yaml
index 64a1f326cc..6758cd7880 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method-and-this.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method-and-this.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/self-naming.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method.yaml
index f1ac3d107b..c045773b13 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-method.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/self-naming.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-this.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-this.yaml
index 211e030598..ff09d133d2 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-this.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming-with-this.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/self-naming.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming.yaml
index d3550f901c..79deae959e 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-self-naming.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/self-naming.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-signed-binding-index.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-signed-binding-index.yaml
index 7f887841bb..7968d7de2a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-signed-binding-index.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-signed-binding-index.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/signed-binding-indexes.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-sparse-decoration.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-sparse-decoration.yaml
index 0ea65d8fc6..4d9c8928a9 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-sparse-decoration.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-sparse-decoration.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/sparse-decoration.xsl
 tests:
@@ -24,7 +25,7 @@ eo: |
       true
       5
       five
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [free] > decorates-with-free-args
     five > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unit-test-without-phi.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unit-test-without-phi.yaml
index d1358504ed..8d44a41bdc 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unit-test-without-phi.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unit-test-without-phi.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/warnings/unit-test-without-phi.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unknown-names.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unknown-names.yaml
index 8df110d707..cfc504d7b3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unknown-names.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unknown-names.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/unknown-names.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unused-aliases.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unused-aliases.yaml
index 07c322d8d7..bb33a0faf6 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unused-aliases.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-unused-aliases.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/expand-aliases.xsl
   - /org/eolang/parser/resolve-aliases.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/const-to-dataized.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/const-to-dataized.yaml
index 053e50da8c..365cf72754 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/const-to-dataized.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/const-to-dataized.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - //o[@base='.as-bytes' and @line and @pos and @name='x' and o[@base='org.eolang.dataized' and o[@base='org.eolang.int' and not(@name)]]]
   - //o[@base='.as-bytes' and @line and @pos and @name='m' and o[@base='org.eolang.dataized' and o[@abstract and @name='m-3' and count(o)=2]]]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-error.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-error.yaml
index 20eb43b0cc..6e50586975 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-error.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-error.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/cti/cti-adds-errors.xsl
 tests:
@@ -19,4 +20,4 @@ eo: |
     QQ.io.stdout > @
       QQ.txt.sprintf
         "The result is %d\n"
-        foo
\ No newline at end of file
+        foo
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-warning.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-warning.yaml
index a5d24bae54..3a0820c4c6 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-warning.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/cti/cti-adds-warning.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/cti/cti-adds-errors.xsl
 tests:
@@ -19,4 +20,4 @@ eo: |
     QQ.io.stdout > @
       QQ.txt.sprintf
         "The result is %d\n"
-        foo
\ No newline at end of file
+        foo
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml
index 23549572c7..2681a8b17b 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/errors[count(*)=0]
   - //o[@name='foo' and count(o)=2]
@@ -7,7 +8,7 @@ eo: |
   +home https://github.com/objectionary/eo
   +package test
   +version 0.0.0
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [x] > foo
     # This is the default 64+ symbols comment in front of abstract object.
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/expand-qqs.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/expand-qqs.yaml
index 9be3f32d2d..890de21a3f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/expand-qqs.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/expand-qqs.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/expand-qqs.xsl
 tests:
@@ -10,7 +11,7 @@ tests:
   - //metas[count(.//meta[head/text()='alias']/*[text()[starts-with(., 'Q.org.eolang.txt.sprintfQQ')]])=2]
 eo: |
   +alias QQ.txt.sprintfQQ
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [] > app
     QQ.io.stdout > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/expands-aliases.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/expands-aliases.yaml
index c2a64af50c..c254ebeb66 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/expands-aliases.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/expands-aliases.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/expand-aliases.xsl
 tests:
@@ -7,7 +8,7 @@ tests:
 eo: |
   +alias org.eolang.txt.scanner
   +alias stdin org.eolang.io.stdin
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [args] > main
     and
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/explicit-data.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/explicit-data.yaml
index afe2b3af76..838e264fb3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/explicit-data.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/explicit-data.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
   - /org/eolang/parser/expand-qqs.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/float-up-same-attrs.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/float-up-same-attrs.yaml
index 656c69a852..dbb512d052 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/float-up-same-attrs.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/float-up-same-attrs.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/remove-refs.xsl
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars-with-pre-methods.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars-with-pre-methods.yaml
index 7f6323d79b..5bdd745f4f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars-with-pre-methods.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars-with-pre-methods.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/vars-float-up.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars.yaml
index c49f919600..894df5394f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/float-vars.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-refs.xsl
   - /org/eolang/parser/vars-float-up.xsl
@@ -33,7 +34,7 @@ eo: |
     # This is the default 64+ symbols comment in front of abstract object.
     [] > last
       three 1
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [ppp] > pp
     one
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/full-syntax.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/full-syntax.yaml
index cb5eb56fa2..eecdacbd76 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/full-syntax.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/full-syntax.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/errors[count(error)=0]
   - /program/license[text()!='']
@@ -79,7 +80,7 @@ eo: |
       @.
         b
     oops
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [] > obj
     "some" > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/has-comment.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/has-comment.yaml
index 5640fdfd89..ab5f1955ee 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/has-comment.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/has-comment.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/comment()[1]
 eo: |
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml
index bdf1c62053..ef90e7cc5d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/errors[count(*)=0]
   - /program/objects[count(o)=1]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/line-numbers.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/line-numbers.yaml
index 5d023c4be1..0a43632fa1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/line-numbers.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/line-numbers.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='foo' and @line='1' and @pos='0']
   - //o[@base='bar' and @line='2' and @pos='2']
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/onlyphi-bound.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/onlyphi-bound.yaml
index f9aeb7ad58..0ac99a5c82 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/onlyphi-bound.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/onlyphi-bound.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='a']/o[@abstract and not(@name) and o[@name='@' and @base='.b'] and o[not(@base) and @name='i']]
   - //o[@base='a']/o[@abstract and not(@name) and o[@name='@' and @base='a' and o[@base='b']]]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fix-names-with-duplicates.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fix-names-with-duplicates.yaml
index 6efd6d8fe4..2722547a26 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fix-names-with-duplicates.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fix-names-with-duplicates.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/remove-refs.xsl
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
@@ -15,7 +16,7 @@ eo: |
       plus. > @
         f.next
         s.next
-  
+
     seq > @
       QQ.io.stdout
         QQ.txt.sprintf
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fixes-globals.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fixes-globals.yaml
index f52d10bade..1e38045d90 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fixes-globals.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/fixes-globals.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/globals-to-abstracts.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-abstracts.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-abstracts.yaml
index cc390c1ead..41b9fa27a0 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-abstracts.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-abstracts.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/remove-refs.xsl
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-and-keep-names.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-and-keep-names.yaml
index 160ccde99e..192f5b8705 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-and-keep-names.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-and-keep-names.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/remove-refs.xsl
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-nested-anonymous.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-nested-anonymous.yaml
index 01b304e5c6..91b1b4d884 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-nested-anonymous.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/float-nested-anonymous.yaml
@@ -1,3 +1,4 @@
+---
 defaults: true
 xsls:
   - /org/eolang/parser/add-refs.xsl
@@ -8,4 +9,4 @@ tests:
 eo: |
   foo > a
     [x]
-      x > @
\ No newline at end of file
+      x > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/floating-sets-parent-names.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/floating-sets-parent-names.yaml
index 545d40ae9b..168693da12 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/floating-sets-parent-names.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/floating-sets-parent-names.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-refs.xsl
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/multi-anonymous.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/multi-anonymous.yaml
index c26eeb47e9..e8b906e1b7 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/multi-anonymous.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/multi-anonymous.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
   - /org/eolang/parser/critical-errors/duplicate-names.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/not-redundant-levels.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/not-redundant-levels.yaml
index 549c78e960..90c5b7d6e3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/not-redundant-levels.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/not-redundant-levels.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
   - /org/eolang/parser/optimize/remove-levels.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-abstract-parents.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-abstract-parents.yaml
index 5b84075879..f3df77213d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-abstract-parents.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-abstract-parents.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
   - /org/eolang/parser/optimize/remove-levels.xsl
@@ -56,4 +57,4 @@ eo: |
         arg.one > @
       # This is the default 64+ symbols comment in front of abstract object.
       [] > second
-        arg.two > @
\ No newline at end of file
+        arg.two > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-siblings.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-siblings.yaml
index 720790cd17..3897d28003 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-siblings.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arguments-and-siblings.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
   - /org/eolang/parser/optimize/remove-levels.xsl
@@ -45,4 +46,4 @@ eo: |
         arg.one > @
       # This is the default 64+ symbols comment in front of abstract object.
       [] > second
-        arg.two > @
\ No newline at end of file
+        arg.two > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arrays.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arrays.yaml
index 9a56155033..a722430df6 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arrays.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-arrays.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
@@ -44,4 +45,4 @@ eo: |
     * 0 (* 1 2) > arr
     eq > @
       * ((arr.at 1).at 1)
-      * 2
\ No newline at end of file
+      * 2
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-siblings.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-siblings.yaml
index aab7072c31..79b55f232d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-siblings.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels-with-siblings.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
   - /org/eolang/parser/optimize/remove-levels.xsl
@@ -39,4 +40,4 @@ eo: |
         1 > @
       # This is the default 64+ symbols comment in front of abstract object.
       [] > second
-        2 > @
\ No newline at end of file
+        2 > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels.yaml
index d442c2c097..f7c7ced0d1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/optimize/redundant-levels.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/optimize/abstracts-float-up.xsl
   - /org/eolang/parser/optimize/remove-levels.xsl
@@ -37,4 +38,4 @@ eo: |
         1 > @
       # This is the default 64+ symbols comment in front of abstract object.
       [] > second
-        2 > @
\ No newline at end of file
+        2 > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/parsed-data.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/parsed-data.yaml
index 6200d9cab9..3ca915bced 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/parsed-data.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/parsed-data.yaml
@@ -1,3 +1,4 @@
+---
 xsls: [ ]
 tests:
   - //o[@name='i1' and text()='00 00 00 00 00 00 00 2A']
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/preserves-spaces.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/preserves-spaces.yaml
index 0f29e0934a..ae594ba26e 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/preserves-spaces.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/preserves-spaces.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/not-empty-atoms.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml
index b7b12d253c..b6c45cf8be 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/errors[count(error)=0]
   - //o[@base='.plus']/o[@base='.value']/o[contains(@base,'other')]
@@ -8,4 +9,4 @@ eo: |
 
   # This is the default 64+ symbols comment in front of abstract object.
   [] > x
-    1.times 2 (1.plus other.value) > @
\ No newline at end of file
+    1.times 2 (1.plus other.value) > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml
index fdd02ef28d..29a06c031c 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/errors[count(error)=0]
   - //o[@base='.plus']/o[@base='.a']/o[@base='^']
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml
index fb60452719..dba989c2ec 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml
@@ -1,3 +1,4 @@
+---
 tests:
   - /program/errors[count(*)=0]
   - //o[@name='f' and @line='8']
@@ -6,7 +7,7 @@ eo: |
   +home https://github.com/objectionary/eo
   +package test
   +version 0.0.0
-  
+
   # This is the default 64+ symbols comment in front of abstract object.
   [args] > main
     # This is the default 64+ symbols comment in front of abstract object.
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/resolves-aliases.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/resolves-aliases.yaml
index 7e758cfd3e..30bfda6579 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/resolves-aliases.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/resolves-aliases.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/add-refs.xsl
   - /org/eolang/parser/expand-aliases.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/scope-before-method.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/scope-before-method.yaml
index 465df421e8..bdbbc8b239 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/scope-before-method.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/scope-before-method.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='foo' and count(o)=1]
 eo: |
@@ -11,4 +12,4 @@ eo: |
         42 > @
     eq. > @
       (foo 1).@ 2
-      42
\ No newline at end of file
+      42
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-double-scope.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-double-scope.yaml
index 43bbc39766..f8eed06abb 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-double-scope.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-double-scope.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='foo' and count(o)=2]
   - //o[@base='bar' and count(o)=2]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-nested.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-nested.yaml
index c58cd65eeb..3111f9d27b 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-nested.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-nested.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='foo' and count(o)=2]
   - //o[@base='bar' and count(o)=2]
@@ -17,4 +18,4 @@ eo: |
       44 > @
     eq. > @
       foobar (foo (bar 1 2) 3) 4
-      44
\ No newline at end of file
+      44
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-doubled-methods.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-doubled-methods.yaml
index ad9818bb1a..d44e8d94a7 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-doubled-methods.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-doubled-methods.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
 tests:
@@ -7,4 +8,4 @@ eo: |
   # This is the default 64+ symbols comment in front of abstract object.
   [] > aliases
     eq. > @
-      (1.bar 2).foo (3.bar 4)
\ No newline at end of file
+      (1.bar 2).foo (3.bar 4)
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-nested-methods.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-nested-methods.yaml
index ce67f2195f..ec3876c72c 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-nested-methods.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes-with-nested-methods.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes.yaml
index ae2002cfd8..a22eee36ff 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/scopes.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/scopes.yaml
@@ -1,7 +1,8 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@abstract and count(o)=1]
 eo: |
   # This is the default 64+ symbols comment in front of abstract object.
   [] > aliases
-    a (b (c d))
\ No newline at end of file
+    a (b (c d))
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/self-naming-no-catch.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/self-naming-no-catch.yaml
index 65f1fa5f51..67d89939ce 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/self-naming-no-catch.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/self-naming-no-catch.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/errors/self-naming.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/simple.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/simple.yaml
index 7a0a877ae7..a6952839ff 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/simple.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/simple.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/errors[count(*)=0]
   - /program[@name != '']
@@ -11,7 +12,7 @@ tests:
   - //o[@base='c4-5' and @line='5']
 eo: |
   +package test
-  
+
   a
     b-друг
       c4-5
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous-more.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous-more.yaml
index 09530fd878..b7b48eb7b8 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous-more.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous-more.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
 
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous.yaml
index a377d9c7e0..c79ee7f865 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/anonymous.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //objects[count(o)=5]
   - //o[@base='.plus' and @name='a']
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bool-tests-straight.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bool-tests-straight.yaml
index 2d8ccaf5b6..2c4a17619c 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bool-tests-straight.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bool-tests-straight.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //errors[count(error)=0]
 eo: |
@@ -1391,4 +1392,4 @@ eo: |
       .org
       .eolang
       .bytes:0
-        01-
\ No newline at end of file
+        01-
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bound-reversed-application.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bound-reversed-application.yaml
index 177fd2ca32..28d1047bc3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bound-reversed-application.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/bound-reversed-application.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/errors[count(*)=0]
   - //o[@base='.if' and o[@base='string' and @as='0']]
@@ -10,4 +11,4 @@ eo: |
     true
     "TRUE":0
     "FALSE":1
-  if. false 1:a 2:b > second
\ No newline at end of file
+  if. false 1:a 2:b > second
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/escape-sequences.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/escape-sequences.yaml
index 951f2d16d8..f0767f5de0 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/escape-sequences.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/escape-sequences.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //objects[count(.//o[@base='string'])=7]
 eo: |
@@ -9,4 +10,3 @@ eo: |
   "\t"
   "\000"
   "\uFFFF"
-
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/numbers.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/numbers.yaml
index 69b515b657..e46fd69bdf 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/numbers.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/numbers.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //objects[count(o)=7]
 eo: |
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/post-method.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/post-method.yaml
index f0416ead96..635d13ceaa 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/post-method.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/post-method.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='one' and @name='test']
   - //o[@base='one' and count(o)=1]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/pre-method.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/pre-method.yaml
index 04b69be420..684a8338a4 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/pre-method.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/pre-method.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='.a' and @name='one' and count(o)=1]
   - //o[@base='.b' and @name='two' and count(o)=1]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/redundant-parentheses.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/redundant-parentheses.yaml
index 1621c09c45..987f05e8f1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/redundant-parentheses.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/redundant-parentheses.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/errors[count(*)=0]
 eo: |
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/text-block.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/text-block.yaml
index 4bd3e51054..f369c6edd1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/text-block.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/text-block.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='string' and text()='48 69 2C 20 74 68 65 72 65 0A 41 64 69 C3 B3 73']
   - //o[@base='string' and text()='66 69 72 73 74 0A 20 73 65 63 6F 6E 64']
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/tuples.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/tuples.yaml
index 8cea9b0dac..d7da96a6b0 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/tuples.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/tuples.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/stars-to-tuples.xsl
   - /org/eolang/parser/stars-to-tuples.xsl
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/versions.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/versions.yaml
index c6395ed6f6..80f718e9b7 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/versions.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/versions.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //o[@base='func0' and @ver='3.4.5' and @name='x']
   - //o[@base='func1' and @ver='1.2.3']
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vertical-methods-in-application.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vertical-methods-in-application.yaml
index eb88cde946..2f05c589fb 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vertical-methods-in-application.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vertical-methods-in-application.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/errors[count(*)=0]
 eo: |
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vmethod-after-formation.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vmethod-after-formation.yaml
index 581896d064..74e92f1b70 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vmethod-after-formation.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/syntax/vmethod-after-formation.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - //errors[count(error)=0]
   - //o[@name='x' and @abstract]/following::o[@base='.first' and @method]
@@ -9,4 +10,4 @@ eo: |
     y > @
       []
       .second
-  .first
\ No newline at end of file
+  .first
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/unicode.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/unicode.yaml
index a16b273d06..49524a4c8a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/unicode.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/unicode.yaml
@@ -1,4 +1,5 @@
-xsls: []
+---
+xsls: [ ]
 tests:
   - /program/errors[count(*)=0]
   - /program/objects[count(o)=1]
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/wraps-methods.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/wraps-methods.yaml
index 941fe367a5..3b479a95df 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/wraps-methods.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/wraps-methods.yaml
@@ -1,3 +1,4 @@
+---
 xsls:
   - /org/eolang/parser/wrap-method-calls.xsl
 tests:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/bytes.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/bytes.yaml
index 7b7830caf3..a6efb9658a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/bytes.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/bytes.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   EA-EA-EA-EA > xs
 
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/dataless.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/dataless.yaml
index 9c167eb11a..5ae39886d2 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/dataless.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/dataless.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   +package sandbox
 
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/empty-bytes.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/empty-bytes.yaml
index 2a6decade7..45ebf17c83 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/empty-bytes.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/empty-bytes.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   -- > empty
 
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/empty-string.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/empty-string.yaml
index 03e2fba92f..483a456a9a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/empty-string.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/empty-string.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > app
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/idiomatic.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/idiomatic.yaml
index 8395096196..d9b1d80d40 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/idiomatic.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/idiomatic.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the license part
   # of the program
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/inheritance.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/inheritance.yaml
index e5102a8be6..1219b9065a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/inheritance.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/inheritance.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   +package sandbox
   +alias stdout org.eolang.io.stdout
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/inner-formation.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/inner-formation.yaml
index 2760b5b674..a5e750644b 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/inner-formation.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/inner-formation.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > foo
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/just-float.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/just-float.yaml
index f6171ca491..be30e8b5a4 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/just-float.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/just-float.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   3.14 > pi
   # This is the default 64+ symbols comment in front of named abstract object.
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/multiline-string.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/multiline-string.yaml
index 3018c95b9c..6bb41d5280 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/multiline-string.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/multiline-string.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > app
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/same-name-inners.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/same-name-inners.yaml
index 5326a0c559..25c0fbec69 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/same-name-inners.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/same-name-inners.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > compiles-correctly-with-long-duplicate-names
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/stars-tuples.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/stars-tuples.yaml
index 02c9616a74..bd32637c8d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/stars-tuples.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/stars-tuples.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   * 1 "Hello" x > array
 
diff --git a/eo-parser/src/test/resources/org/eolang/parser/samples/times.yaml b/eo-parser/src/test/resources/org/eolang/parser/samples/times.yaml
index 330a6dbbd0..ea0f54060e 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/samples/times.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/samples/times.yaml
@@ -1,3 +1,4 @@
+---
 origin: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > app
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/binding-with-rho.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/binding-with-rho.yaml
index 42b501f418..5cd3a63865 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/binding-with-rho.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/binding-with-rho.yaml
@@ -1,3 +1,4 @@
+---
 line: 2
 eo: |
   x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/broken-head.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/broken-head.yaml
index f86b026236..9cbdb30f28 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/broken-head.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/broken-head.yaml
@@ -1,3 +1,4 @@
+---
 line: 2
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/comment-in-method.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/comment-in-method.yaml
index 6572a3878b..d246667caf 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/comment-in-method.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/comment-in-method.yaml
@@ -1,3 +1,4 @@
+---
 line: 5
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/double-empty-lines.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/double-empty-lines.yaml
index bf8c8da330..bd5fd49e29 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/double-empty-lines.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/double-empty-lines.yaml
@@ -1,8 +1,9 @@
+---
 line: 4
 eo: |
   # This is the default 64+ symbols comment in front of abstract object.
   [args] > one
-  
-  
+
+
   # This is the default 64+ symbols comment in front of abstract object.
   [] > two
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/double-root-inside-locator.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/double-root-inside-locator.yaml
index 5f6189205f..fddfff0650 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/double-root-inside-locator.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/double-root-inside-locator.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-application.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-application.yaml
index bb8afc7844..5b946f0489 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-application.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-application.yaml
@@ -1,3 +1,4 @@
+---
 line: 6
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-first-object.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-first-object.yaml
index 35feb56a1e..2c953ef46d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-first-object.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-first-object.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method-2.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method-2.yaml
index f609350e40..3a815fa2c2 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method-2.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method-2.yaml
@@ -1,10 +1,11 @@
+---
 line: 19
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
   [] > main
     # This is the default 64+ symbols comment in front of abstract object
     [] > x
-  
+
     # This is the default 64+ symbols comment in front of abstract object
     [] > y
 
@@ -14,8 +15,8 @@ eo: |
     # This is the default 64+ symbols comment in front of abstract object
     [] > m
     x > a
-  
+
     # This is the default 64+ symbols comment in front of abstract object
     [] > o
-    
+
     o > b
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method.yaml
index 644f01b97b..be91c1e255 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-method.yaml
@@ -1,3 +1,4 @@
+---
 line: 6
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref-deep.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref-deep.yaml
index 17efff002b..721f78f9ab 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref-deep.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref-deep.yaml
@@ -1,3 +1,4 @@
+---
 line: 12
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref.yaml
index 216a41dab1..02ee0fd2dd 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-before-ref.yaml
@@ -1,3 +1,4 @@
+---
 line: 6
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-between-metas.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-between-metas.yaml
index cbe147fdf1..dded2730f1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-between-metas.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-between-metas.yaml
@@ -1,9 +1,10 @@
+---
 line: 3
 eo: |
   +meta smth
-  
+
   +meta other
-  
+
   [] > main
     [] > @
       hello > test
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-in-vertical-application.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-in-vertical-application.yaml
index e3d1fc4396..9b017ab646 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-in-vertical-application.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-line-in-vertical-application.yaml
@@ -1,3 +1,4 @@
+---
 line: 5
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-object.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-object.yaml
index 76b0602d4b..a6edacda0a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/empty-object.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/empty-object.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is wrong
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/hmethod-after-vmethod.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/hmethod-after-vmethod.yaml
index 7e5c03d58a..9beb07de0e 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/hmethod-after-vmethod.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/hmethod-after-vmethod.yaml
@@ -1,4 +1,5 @@
+---
 line: 2
 eo: |
   a
-  .b.c
\ No newline at end of file
+  .b.c
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/invalid-int-literal.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/invalid-int-literal.yaml
index e0ca37072e..b04056d061 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/invalid-int-literal.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/invalid-int-literal.yaml
@@ -1,3 +1,4 @@
+---
 line: 6
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/long-character.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/long-character.yaml
index de9ddb77fa..6499c59cff 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/long-character.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/long-character.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/missing-empty-line-after-metas.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/missing-empty-line-after-metas.yaml
index ae60c561f0..6e85556232 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/missing-empty-line-after-metas.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/missing-empty-line-after-metas.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   +meta smth
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/not-empty-atoms.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/not-empty-atoms.yaml
index e1c1d741ec..d9e3a5c9f2 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/not-empty-atoms.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/not-empty-atoms.yaml
@@ -1,3 +1,4 @@
+---
 line: 4
 eo: |
   # This is the default 64+ symbols comment in front of abstract object.
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/one-space-indent.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/one-space-indent.yaml
index 8474c9a673..88fed99aff 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/one-space-indent.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/one-space-indent.yaml
@@ -1,3 +1,4 @@
+---
 line: 4
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-1.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-1.yaml
index 97bbfdeee0..2d6c37d9f3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-1.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-1.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  (1.add (a.add 5) (4)) > x
\ No newline at end of file
+  (1.add (a.add 5) (4)) > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-2.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-2.yaml
index b367c2eaeb..5ebeb81d4f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-2.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-2.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  (1.add (a.add 5) 4) > x
\ No newline at end of file
+  (1.add (a.add 5) 4) > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-3.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-3.yaml
index 7b4bb80a60..f8c02876d5 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-3.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-3.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  (1.add (a.add 5) 4)
\ No newline at end of file
+  (1.add (a.add 5) 4)
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-4.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-4.yaml
index b3a4ba8dcc..8894882451 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-4.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-4.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  (1.add 4) > x
\ No newline at end of file
+  (1.add 4) > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-5.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-5.yaml
index fa1eee4f82..d5cb194b2d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-5.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-5.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  (1.add 4)
\ No newline at end of file
+  (1.add 4)
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-6.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-6.yaml
index 37f2faa137..56c765e2b7 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-6.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/extra-braces-6.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  ((1.add 1)) > x
\ No newline at end of file
+  ((1.add 1)) > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/just-number.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/just-number.yaml
index 2ab9f917ef..9cf07beec1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/just-number.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/just-number.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  1.add (5) > x
\ No newline at end of file
+  1.add (5) > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/negative-numbers.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/negative-numbers.yaml
index 3c4afdd4f8..3678680d9e 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/negative-numbers.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/negative-numbers.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
-  add (-4) (-5) > x
\ No newline at end of file
+  add (-4) (-5) > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/numbers.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/numbers.yaml
index 4d0a6bbe95..193aac2901 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/numbers.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/numbers.yaml
@@ -1,3 +1,4 @@
+---
 line: 2
 eo: |
   add > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application-named.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application-named.yaml
index 6f4fa2cb33..1b99595f19 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application-named.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application-named.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   1.add 1 > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application.yaml
index 9178b2fe29..8d75fe7f17 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundant-parentheses/simple-application.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   1.add 1 > x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/redundent-parenheses.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/redundent-parenheses.yaml
index 74bbab82b9..c9778f0695 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/redundent-parenheses.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/redundent-parenheses.yaml
@@ -1,3 +1,4 @@
+---
 line: 7
 eo: |
   +home https://github.com/objectionary/eo
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/reversed-as-separate-argument.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/reversed-as-separate-argument.yaml
index dd462a684c..1036910ed3 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/reversed-as-separate-argument.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/reversed-as-separate-argument.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/root-inside-locator.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/root-inside-locator.yaml
index 9bab006bee..2d56669754 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/root-inside-locator.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/root-inside-locator.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/scoped-application-after-suffix.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/scoped-application-after-suffix.yaml
index b213969881..dae8112057 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/scoped-application-after-suffix.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/scoped-application-after-suffix.yaml
@@ -1,5 +1,6 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
   [x] > first
-    a > x (b > x)
\ No newline at end of file
+    a > x (b > x)
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-naming.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-naming.yaml
index c9bd229f10..763ff09fa1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-naming.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-naming.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-tail.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-tail.yaml
index 853a8d4a24..c7beecd763 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-tail.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/space-in-tail.yaml
@@ -1,3 +1,4 @@
+---
 line: 2
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/suffix-with-dots.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/suffix-with-dots.yaml
index 720b0ab77f..0c75ec4be7 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/suffix-with-dots.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/suffix-with-dots.yaml
@@ -1,3 +1,4 @@
+---
 line: 2
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/too-far-right-indent.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/too-far-right-indent.yaml
index 4fb5b60e26..55e2042a49 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/too-far-right-indent.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/too-far-right-indent.yaml
@@ -1,3 +1,4 @@
+---
 line: 5
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/trailing-space-in-comment.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/trailing-space-in-comment.yaml
index b5d19ea4e4..1aed28ac57 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/trailing-space-in-comment.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/trailing-space-in-comment.yaml
@@ -1,4 +1,6 @@
+---
 line: 4
+# yamllint disable rule:trailing-spaces
 eo: |
   # This is the default 64+ symbols comment in front of abstract object.
   [] > t
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/varargs-inside.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/varargs-inside.yaml
index ffc4cc90db..52377d0e33 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/varargs-inside.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/varargs-inside.yaml
@@ -1,3 +1,4 @@
+---
 line: 1
 eo: |
   [a b... c] > hello
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/version-with-inline-application.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/version-with-inline-application.yaml
index ab90787aef..050628bf14 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/version-with-inline-application.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/version-with-inline-application.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-horizontal-application.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-horizontal-application.yaml
index ff9a93d5ff..8ddb0655e7 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-horizontal-application.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-horizontal-application.yaml
@@ -1,4 +1,5 @@
+---
 line: 1
 eo: |
   x (a
-  .b x)
\ No newline at end of file
+  .b x)
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-scope.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-scope.yaml
index 7e43774612..23c2c1ba86 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-scope.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/vertical-method-in-scope.yaml
@@ -1,4 +1,5 @@
+---
 line: 1
 eo: |
   (a
-  .b c).x
\ No newline at end of file
+  .b c).x
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-happlication.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-happlication.yaml
index 5082580001..8d5fc7bafb 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-happlication.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-happlication.yaml
@@ -1,4 +1,5 @@
+---
 line: 2
 eo: |
   x y
-  .z
\ No newline at end of file
+  .z
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-hmethod.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-hmethod.yaml
index 0c6250bad7..617132bd41 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-hmethod.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/vmethod-after-hmethod.yaml
@@ -1,4 +1,5 @@
+---
 line: 2
 eo: |
   x.y
-  .z
\ No newline at end of file
+  .z
diff --git a/eo-parser/src/test/resources/org/eolang/parser/typos/xi-inside-locator.yaml b/eo-parser/src/test/resources/org/eolang/parser/typos/xi-inside-locator.yaml
index d449dbb913..0d33aae1aa 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/typos/xi-inside-locator.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/typos/xi-inside-locator.yaml
@@ -1,3 +1,4 @@
+---
 line: 3
 eo: |
   # This is the default 64+ symbols comment in front of abstract object
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs-with-dot.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs-with-dot.yml
index 3d15c202ea..c9eb2daf1d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs-with-dot.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs-with-dot.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/set-locators.xsl
 document:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs.yml
index 8a73cdc95d..81b4123e56 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/add-locs.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/set-locators.xsl
 document:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/add-refs.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/add-refs.yml
index 962e0b050c..5ded5e22b8 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/add-refs.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/add-refs.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/add-refs.xsl
 document:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-correct.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-correct.yml
index f553c40841..5da56e73a6 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-correct.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-correct.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/errors/zero-version.xsl
 document:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-main.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-main.yml
index 82b9126d1b..03576f60b1 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-main.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-main.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/errors/zero-version.xsl
 document:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-test.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-test.yml
index bbd8c29c4a..bb50eb814c 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-test.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-incorrect-for-test.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/errors/zero-version.xsl
 document:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-no-version.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-no-version.yml
index 96c57257ea..fe054d5c05 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-no-version.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-no-version.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/errors/zero-version.xsl
 document:
diff --git a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-not-applicable-source.yml b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-not-applicable-source.yml
index d44a7a623c..2c55023aec 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-not-applicable-source.yml
+++ b/eo-parser/src/test/resources/org/eolang/parser/xax/zero-version-not-applicable-source.yml
@@ -1,3 +1,4 @@
+---
 sheets:
   - /org/eolang/parser/errors/zero-version.xsl
 document:

From 6230b7fdf9558f618a7d0097e1b02ccc89094775 Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sun, 21 Apr 2024 16:32:49 +0300
Subject: [PATCH 6/8] fix(objectionary#3035): fix ./eo-runtime yaml linting
 errors and warnings

---
 eo-runtime/src/test/resources/org/eolang/snippets/all.yaml     | 3 ++-
 .../test/resources/org/eolang/snippets/complex-horizontal.yaml | 3 ++-
 eo-runtime/src/test/resources/org/eolang/snippets/fibo.yaml    | 2 +-
 .../src/test/resources/org/eolang/snippets/ifthenelse.yaml     | 2 +-
 .../src/test/resources/org/eolang/snippets/parenting.yaml      | 1 +
 .../test/resources/org/eolang/snippets/simple-horizontal.yaml  | 3 ++-
 eo-runtime/src/test/resources/org/eolang/snippets/simple.yaml  | 3 ++-
 .../resources/org/eolang/snippets/vertical-bound-methods.yaml  | 3 ++-
 8 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/all.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/all.yaml
index c2fc78f26c..12b758a9c0 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/all.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/all.yaml
@@ -1,7 +1,8 @@
+---
 out:
   - ".*works!.*"
 file: org/eolang/snippets/all.eo
-args: ["org.eolang.snippets.all"]
+args: [ "org.eolang.snippets.all" ]
 eo: |
   +package org.eolang.snippets
 
diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/complex-horizontal.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/complex-horizontal.yaml
index 0bf7ae8b7d..0973f9e598 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/complex-horizontal.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/complex-horizontal.yaml
@@ -1,7 +1,8 @@
+---
 out:
   - ".*Hello, Jeff.*"
 file: org/eolang/snippets/complex-horizontal.eo
-args: ["org.eolang.snippets.complex-horizontal"]
+args: [ "org.eolang.snippets.complex-horizontal" ]
 eo: |
   +package org.eolang.snippets
   +alias org.eolang.io.stdout
diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/fibo.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/fibo.yaml
index 846ca25987..71facbab49 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/fibo.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/fibo.yaml
@@ -1,3 +1,4 @@
+---
 skip: true
 file: org/eolang/snippets/fibo.eo
 out:
@@ -22,4 +23,3 @@ eo: |
         "%d is the %dth number\n"
         8
         f 6
-
diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/ifthenelse.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/ifthenelse.yaml
index af2177dab8..2864eb43bb 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/ifthenelse.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/ifthenelse.yaml
@@ -1,3 +1,4 @@
+---
 out:
   - ".*greater.*"
 file: org/eolang/snippets/ifthenelse.eo
@@ -16,4 +17,3 @@ eo: |
         "greater"
     stdout > @
       f 17
-
diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/parenting.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/parenting.yaml
index 9564d38234..cfc0271bd1 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/parenting.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/parenting.yaml
@@ -1,3 +1,4 @@
+---
 file: org/eolang/snippets/parenting.eo
 out:
   - ".*123.*"
diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/simple-horizontal.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/simple-horizontal.yaml
index 64c26c83c5..18d2f4c20c 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/simple-horizontal.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/simple-horizontal.yaml
@@ -1,7 +1,8 @@
+---
 out:
   - ".*Hello, Jeff!.*"
 file: org/eolang/snippets/simple-horizontal.eo
-args: ["org.eolang.snippets.simple-horizontal"]
+args: [ "org.eolang.snippets.simple-horizontal" ]
 eo: |
   +package org.eolang.snippets
   +alias org.eolang.io.stdout
diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/simple.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/simple.yaml
index cd6cf433f8..e221e80073 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/simple.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/simple.yaml
@@ -1,7 +1,8 @@
+---
 out:
   - ".*Hello, Jeff!.*"
 file: org/eolang/snippets/simple.eo
-args: ["org.eolang.snippets.simple"]
+args: [ "org.eolang.snippets.simple" ]
 eo: |
   +package org.eolang.snippets
   +alias org.eolang.io.stdout
diff --git a/eo-runtime/src/test/resources/org/eolang/snippets/vertical-bound-methods.yaml b/eo-runtime/src/test/resources/org/eolang/snippets/vertical-bound-methods.yaml
index 3191d11db3..9c69f799e6 100644
--- a/eo-runtime/src/test/resources/org/eolang/snippets/vertical-bound-methods.yaml
+++ b/eo-runtime/src/test/resources/org/eolang/snippets/vertical-bound-methods.yaml
@@ -1,7 +1,8 @@
+---
 out:
   - ".*first.*"
 file: org/eolang/snippets/vmb.eo
-args: ["org.eolang.snippets.vbm"]
+args: [ "org.eolang.snippets.vbm" ]
 eo: |
   +package org.eolang.snippets
   +alias org.eolang.io.stdout

From 3230a66f4fd49af208ccb524c504ffcc1bb02d46 Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sun, 21 Apr 2024 16:33:59 +0300
Subject: [PATCH 7/8] fix(objectionary#3035): fix remaining yaml linting errors
 and warnings

---
 .0pdd.yml         | 1 +
 .codacy.yml       | 1 +
 .markdownlint.yml | 3 ++-
 .rultor.yml       | 1 +
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/.0pdd.yml b/.0pdd.yml
index 36d0a7feee..91dab09e4e 100644
--- a/.0pdd.yml
+++ b/.0pdd.yml
@@ -1,3 +1,4 @@
+---
 errors:
   - yegor256@gmail.com
 # alerts:
diff --git a/.codacy.yml b/.codacy.yml
index 9d54c54c28..e2c8592ccf 100644
--- a/.codacy.yml
+++ b/.codacy.yml
@@ -1,6 +1,7 @@
 # @todo #1326:30min Enable only necessary tests. Several checks
 #  are not available for the project. For example a lot of
 #  package name contains capital letter and such names are conventional.
+---
 exclude_paths:
   - "eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EOencaged$EOencage.java"
   - "eo-runtime/src/main/java/EOorg/EOeolang/Cages.java"
diff --git a/.markdownlint.yml b/.markdownlint.yml
index 7bf567f1ae..f2a8a2bcd9 100644
--- a/.markdownlint.yml
+++ b/.markdownlint.yml
@@ -1,3 +1,4 @@
+---
 # Default state for all rules
 default: true
 
@@ -7,7 +8,7 @@ MD013:
 
 # Inline HTML : https://github.com/DavidAnson/markdownlint/blob/v0.33.0/doc/md033.md
 MD033:
-  allowed_elements: [img]
+  allowed_elements: [ img ]
 
 # Fenced code blocks should have a language specified : https://github.com/DavidAnson/markdownlint/blob/v0.33.0/doc/md040.md
 MD040: false
diff --git a/.rultor.yml b/.rultor.yml
index 225aa2db49..4ab42ed64f 100644
--- a/.rultor.yml
+++ b/.rultor.yml
@@ -1,3 +1,4 @@
+---
 architect:
   - yegor256
 ec2:

From 28cd4e79963d45c5de87bee4687f0b52d288ea5a Mon Sep 17 00:00:00 2001
From: Vyacheslav Rybalchenko <v.rybalchenko@innopolis.university>
Date: Sun, 21 Apr 2024 20:02:35 +0300
Subject: [PATCH 8/8] fix(objectionary#3035): fix phi and unphi newline parsing

---
 .../src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml    | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml     | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml  | 2 +-
 .../test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml    | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml     | 2 +-
 .../test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml  | 2 +-
 .../test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml   | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/empty.yaml     | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml  | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml | 2 +-
 .../org/eolang/maven/phi/yaml/iterates-over-counter.yaml        | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml  | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/method.yaml    | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/nested.yaml    | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml  | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/package.yaml   | 2 +-
 .../resources/org/eolang/maven/phi/yaml/same-name-inner.yaml    | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/specials.yaml  | 2 +-
 .../org/eolang/maven/phi/yaml/with-anonym-abstract.yaml         | 2 +-
 .../src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml | 2 +-
 .../org/eolang/maven/phi/yaml/with-free-attributes.yaml         | 2 +-
 .../src/test/resources/org/eolang/maven/unphi/bindings.yaml     | 2 +-
 .../src/test/resources/org/eolang/maven/unphi/bool-tests.yaml   | 2 +-
 .../test/resources/org/eolang/maven/unphi/long-names-inner.yaml | 2 +-
 .../src/test/resources/org/eolang/maven/unphi/new-lines.yaml    | 2 +-
 .../resources/org/eolang/maven/unphi/with-anonym-abstract.yaml  | 2 +-
 .../src/test/resources/org/eolang/maven/unphi/with-home.yaml    | 2 +-
 27 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml
index 9a8ce4191f..ddc9c62128 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/as-phi.yaml
@@ -6,7 +6,7 @@ eo: |
       length.
         as-phi $
       $.greater-than 0
-phi: |
+phi: |-
   {
     ⟦
       prints-itself ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml
index e0bca74772..37bb9ad076 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/atoms.yaml
@@ -6,7 +6,7 @@ eo: |
   [] > outer
     # This is the default 64+ symbols comment in front of named abstract object.
     [] > inner /bytes
-phi: |
+phi: |-
   {
     ⟦
       main ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml
index adc7d5ac1e..32ecee5191 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bindings.yaml
@@ -5,7 +5,7 @@ eo: |
     [z]:abs
       w > @
     5:five
-phi: |
+phi: |-
   {
     ⟦
       xyz ↦ Φ.org.eolang.x(
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml
index 14201536a2..2d950fbad2 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bool-tests.yaml
@@ -63,7 +63,7 @@ eo: |
       01-.as-bytes.eq true
       00-.as-bytes.eq false
 
-phi: |
+phi: |-
   {
     ⟦
       org ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
index 2e9f3a7af3..7f7c26a07e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
@@ -61,7 +61,7 @@ eo: |
     # the current and the provided one,
     # as a new sequence.
     [b] > concat /bytes
-phi: |
+phi: |-
   {
     ⟦
       org ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml
index a6400947e5..130eab2938 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/custom-alias.yaml
@@ -6,7 +6,7 @@ eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [y] > main
     x y > z
-phi: |
+phi: |-
   {
     ⟦
       foo ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml
index 5380397b6e..35c2ad45ac 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty-bytes.yaml
@@ -1,6 +1,6 @@
 ---
 eo: -- > empty
-phi: |
+phi: |-
   {
     ⟦
       empty ↦ Φ.org.eolang.bytes(
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml
index 73f847d78d..d73f6c38c6 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/empty.yaml
@@ -5,7 +5,7 @@ eo: |
     # This is the default 64+ symbols comment in front of named abstract object.
     [] > x
     seq > y
-phi: |
+phi: |-
   {
     ⟦
       main ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml
index 63789d133f..3aad0adb69 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/fibonaci.yaml
@@ -14,7 +14,7 @@ eo: |
           n.minus 1
         fibonacci
           n.minus 2
-phi: |
+phi: |-
   {
     ⟦
       eo ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml
index a88562b7c0..24a53ebc10 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/full-path.yaml
@@ -2,7 +2,7 @@
 eo: |
   QQ.io.stdout > std
   Q.org.eolang.x > y
-phi: |
+phi: |-
   {
     ⟦
       std ↦ Φ.org.eolang.io.stdout,
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml
index 5ae7fcc1b0..73746aa167 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/iterates-over-counter.yaml
@@ -14,7 +14,7 @@ eo: |
             x.write > @
               x.as-int.plus 1
         11
-phi: |
+phi: |-
   {
     ⟦
       iterates-over-simple-counter ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml
index 8923afa2e7..d7a8ebeae5 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/jeo-part.yaml
@@ -8,7 +8,7 @@ eo: |
     "java/lang/Object" > supername
     * > interfaces
       "org/eolang/benchmark/F"
-phi: |
+phi: |-
   {
     ⟦
       org ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml
index d29a488a4b..9489eade6c 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/method.yaml
@@ -1,6 +1,6 @@
 ---
 eo: x.y.z > xyz
-phi: |
+phi: |-
   {
     ⟦
       xyz ↦ Φ.org.eolang.x.y.z
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml
index f71644df42..db7cbf10d7 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/nested.yaml
@@ -12,7 +12,7 @@ eo: |
           main 5 > five
           a > b
           d > e
-phi: |
+phi: |-
   {
     ⟦
       main ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml
index 82bb0be926..2dcb0d7f95 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/one-byte.yaml
@@ -1,6 +1,6 @@
 ---
 eo: A2- > bts
-phi: |
+phi: |-
   {
     ⟦
       bts ↦ Φ.org.eolang.bytes(
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml
index b3a5e8a788..aae3a05617 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/package.yaml
@@ -5,7 +5,7 @@ eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [] > main
     stdout > @
-phi: |
+phi: |-
   {
     ⟦
       foo ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml
index c0d21eae84..2c081a5bd7 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/same-name-inner.yaml
@@ -13,7 +13,7 @@ eo: |
             # Long object 5.
             [] > long-object-name
     true > @
-phi: |
+phi: |-
   {
     ⟦
       compiles-correctly-with-long-duplicate-names ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml
index f4d5a28b36..a888b9afaa 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/specials.yaml
@@ -6,7 +6,7 @@ eo: |
     y.& > h
     $.a > a
     @.@ > phi
-phi: |
+phi: |-
   {
     ⟦
       main ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml
index 2136a24232..072689274e 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-anonym-abstract.yaml
@@ -4,7 +4,7 @@ eo: |
   [] > test
     ([] (^ > x)).plus > s
       int
-phi: |
+phi: |-
   {
     ⟦
       test ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml
index 0b68a8c5ed..d3ee9566f9 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-data.yaml
@@ -1,6 +1,6 @@
 ---
 eo: 5 > five
-phi: |
+phi: |-
   {
     ⟦
       five ↦ Φ.org.eolang.int(
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml
index fffd4d16d5..990e3726d2 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/with-free-attributes.yaml
@@ -3,7 +3,7 @@ eo: |
   # This is the default 64+ symbols comment in front of named abstract object.
   [a b] > c
     d > @
-phi: |
+phi: |-
   {
     ⟦
       c ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml
index 265acfb514..1d2afd9282 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bindings.yaml
@@ -23,7 +23,7 @@ tests:
   - /program/objects/o[@method and @base='.x' and @name='xyz']/o[@base='.int' and @method and @as='five']/o[@base='.eolang' and @method]
   - /program/objects/o[@method and @base='.x' and @name='xyz']/o[@base='.int' and @method and @as='five']/o[@base='.bytes' and @method and @as='0']
   - /program/objects/o[@method and @base='.x' and @name='xyz']/o[@base='.int' and @method and @as='five']/o[@base='.bytes' and @method and @as='0']/text()
-phi: |
+phi: |-
   {
     ⟦
       xyz ↦ Φ.org.eolang.x(
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml
index 64c7de125d..08e9eeb341 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/bool-tests.yaml
@@ -1,7 +1,7 @@
 ---
 tests:
   - //errors[count(error)=0]
-phi: |
+phi: |-
   {
     ⟦
       org ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml
index f1c7356143..eb1fc53777 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/long-names-inner.yaml
@@ -1,7 +1,7 @@
 ---
 tests:
   - //o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name' and o[@abstract and @name='long-object-name']]]]]
-phi: |
+phi: |-
   {
     ⟦
       compiles-correctly-with-long-duplicate-names ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml
index 7884246977..31b1a2bb01 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/new-lines.yaml
@@ -1,7 +1,7 @@
 ---
 tests:
   - /program/objects/o[@name='main' and @abstract and o[@name='x']]
-phi: |
+phi: |-
   {
     ⟦
       main ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml
index 8f46bb295f..39ad9b7ab9 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-anonym-abstract.yaml
@@ -3,7 +3,7 @@ tests:
   - //o[@name='test' and count(o)=2]
   - //o[@name='test']/o[position()=1 and @abstract and not(@name)]
   - //o[@name='test']/o[last() and @base='.plus' and @method]
-phi: |
+phi: |-
   {
     ⟦
       test ↦ ⟦
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml
index d50103449e..606b39b267 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/unphi/with-home.yaml
@@ -1,7 +1,7 @@
 ---
 tests:
   - /program/objects/o[@name='main' and @abstract and o[@name='x']]
-phi: |
+phi: |-
   Φ ↦ ⟦
     main ↦ ⟦
       x ↦ ξ.y