Add dependencies and refactor code

.gitignore

@@ -1 +1,2 @@
 /target
+*.log

Cargo.toml

@@ -25,7 +25,7 @@ thiserror = "1.0.50"
 typst-syntax = { git = "https://github.com/typst/typst.git", tag = "v0.9.0" }
 
 [dev-dependencies]
-insta = "1.34.0"
+insta = { version = "1.34.0", features = ["yaml"] }
 
 [build-dependencies]
 anyhow = "1.0.75"
@@ -36,3 +36,7 @@ vergen = { version = "8.2.5", features = [
   "git2",
   "rustc",
 ] }
+
+[profile.dev.package]
+insta.opt-level = 3
+similar.opt-level = 3

examples/pretty_test.rs

@@ -2,12 +2,12 @@ use pretty::BoxDoc;
 
 fn main() {
     let strs = ["123", "12345", "1234", "1234567"];
-    
+
     let inner_flat: BoxDoc<'_, ()> = BoxDoc::intersperse(
         strs.into_iter().map(BoxDoc::text),
         BoxDoc::text(",").append(BoxDoc::space()),
     );
-    
+
     let inner_multi = {
         let mut inner = BoxDoc::nil();
         for s in strs {
@@ -18,14 +18,15 @@ fn main() {
         BoxDoc::line().append(inner)
     }
     .nest(2);
-  
+
     let outer = BoxDoc::text("[")
         .append(inner_multi.flat_alt(inner_flat).group())
+        // https://hackage.haskell.org/package/prettyprinter-1.7.1/docs/Prettyprinter.html#v:group
         .append(BoxDoc::text("]"));
 
     let res_10 = outer.pretty(10).to_string();
     let res_80 = outer.pretty(80).to_string();
-    
+
     println!("10:\n{}", res_10);
     println!("80:\n{}", res_80);
 }