Keep line break after with keyword (#94)

* Optional line break after 'with' keyword

* 0.4.2

* Bump mo-fmt

package.json

@@ -1,6 +1,6 @@
 {
     "name": "prettier-plugin-motoko",
-    "version": "0.4.1",
+    "version": "0.4.2",
     "description": "A code formatter for the Motoko smart contract language.",
     "main": "lib/environments/node.js",
     "browser": "lib/environments/web.js",

packages/mo-fmt/package.json

@@ -1,6 +1,6 @@
 {
     "name": "mo-fmt",
-    "version": "0.4.1",
+    "version": "0.4.2",
     "description": "An easy-to-use Motoko formatter command.",
     "main": "src/cli.js",
     "bin": {
@@ -21,7 +21,7 @@
         "commander": "^9.4.0",
         "fast-glob": "^3.2.11",
         "prettier": "^2.7",
-        "prettier-plugin-motoko": "^0.4.1"
+        "prettier-plugin-motoko": "^0.4.2"
     },
     "devDependencies": {
         "@rollup/plugin-commonjs": "^22.0.2",

src/printers/motoko-tt-ast/spaceConfig.ts

@@ -133,6 +133,9 @@ const spaceConfig: SpaceConfig = {
         [tokenEquals('-'), '_', 'keep'],
         [tokenEquals('^'), '_', 'keep'],
 
+        // 'with' keyword
+        [tokenEquals('with'), '_', 'keep-space'],
+
         // soft-wrapping operators
         ['_', 'Dot', 'nil'],
         // ['_', 'Dot', 'softwrap'],

tests/formatter.test.ts

@@ -365,4 +365,9 @@ describe('Motoko formatter', () => {
     test('invisible unicode characters', () => {
         expect(format('let x\u200b = 123;')).toStrictEqual('let x = 123;\n');
     });
+
+    test('`with` keyword', () => {
+        expect(format('{a and b with c = d}')).toStrictEqual('{ a and b with c = d }\n');
+        expect(format('{a and b with\nc = d}')).toStrictEqual('{\n  a and b with\n  c = d\n};\n');
+    });
 });