Treat regex literals and template string literals as atoms in JS/TS

Fixes #64

CHANGELOG.md

@@ -8,6 +8,9 @@ Updated the C, CSS and JSON parsers to the latest upstream versions.
 
 Expanded filename associations, so difftastic recognises more files.
 
+Improved parsing for regex and template string literals in JavaScript
+and TypeScript.
+
 Improved word diffing on punctuation in comments.
 
 When logging is enabled (e.g. `RUST_LOG=warn`), difftastic now warns

src/tree_sitter_parser.rs

@@ -186,7 +186,7 @@ pub fn from_extension(extension: &OsStr) -> Option<TreeSitterConfig> {
         "cjs" | "js" | "jsx" | "mjs" => Some(TreeSitterConfig {
             name: "JavaScript",
             language: unsafe { tree_sitter_javascript() },
-            atom_nodes: (vec!["string"]).into_iter().collect(),
+            atom_nodes: (vec!["string", "template_string", "regex"]).into_iter().collect(),
             delimiter_tokens: (vec![
                 ("[", "]"),
                 ("(", ")"),
@@ -263,7 +263,7 @@ pub fn from_extension(extension: &OsStr) -> Option<TreeSitterConfig> {
         "ts" => Some(TreeSitterConfig {
             name: "TypeScript",
             language: unsafe { tree_sitter_typescript() },
-            atom_nodes: (vec!["string", "template_string"]).into_iter().collect(),
+            atom_nodes: (vec!["string", "template_string", "regex"]).into_iter().collect(),
             delimiter_tokens: (vec![("{", "}"), ("(", ")"), ("[", "]"), ("<", ">")]),
             highlight_queries: include_str!("../vendor/highlights/typescript.scm"),
         }),