Treat Newick and Racket as lisps

CHANGELOG.md

@@ -1,5 +1,10 @@
 ## 0.45 (unreleased)
 
+### Diffing
+
+Racket and Newick are now treated as lisps for the purposes for
+parenthesis heuristics.
+
 ### Parsing
 
 Improved parsing for Makefiles.

sample_files/compare.expected

@@ -131,7 +131,7 @@ sample_files/nesting_before.el sample_files/nesting_after.el
 9fcf6b8adf148cdae47bc3a5f8068e41  -
 
 sample_files/newick_before.nwk sample_files/newick_after.nwk
-4778aef7b901b2cc7f9ad3601f87864d  -
+2919522e564dad74183ef2411bfc3111  -
 
 sample_files/nix_before.nix sample_files/nix_after.nix
 09a56752c1eb7f3f5c10d631a01973fc  -

src/diff/sliders.rs

@@ -56,7 +56,7 @@ fn prefer_outer_delimiter(language: guess_language::Language) -> bool {
     match language {
         // For Lisp family languages, we get the best result with the
         // outer delimiter.
-        EmacsLisp | Clojure | CommonLisp | Janet => true,
+        EmacsLisp | Clojure | CommonLisp | Janet | Racket | Newick => true,
         // JSON and TOML are like Lisp: the outer delimiter in an array object
         // is the most relevant.
         Json | Toml | Hcl => true,