feat: allow renames to begin with "@"

src/main.rs

@@ -666,9 +666,13 @@ impl LanguageServer for Backend {
         };
         let query = Query::new(&QUERY_LANGUAGE, "(capture) @cap").unwrap();
         let mut cursor = QueryCursor::new();
-        let new_name = params.new_name;
+        // Allow the new name to begin with "@"
+        let new_name = params
+            .new_name
+            .strip_prefix('@')
+            .unwrap_or(params.new_name.as_str());
         let identifier_pattern = Regex::new(r#"^[a-zA-Z0-9.\-_\$]+$"#).unwrap();
-        if !identifier_pattern.is_match(new_name.as_str()) {
+        if !identifier_pattern.is_match(new_name) {
             return Err(jsonrpc::Error::invalid_params(
                 "New name is not a valid identifier",
             ));
@@ -694,7 +698,7 @@ impl LanguageServer for Backend {
                 },
                 edits: vec![OneOf::Left(TextEdit {
                     range: elem.range,
-                    new_text: new_name.clone(),
+                    new_text: new_name.to_owned(),
                 })],
             });
         });