Merge #6491

6491: Textmate grammar: allow variables to terminate ranges r=dustypomerleau a=dustypomerleau

Variables were originally designed not to match after a dot, in order to avoid matching struct field access, however this resulted in variables that end ranges not being highlighted. In order to fix this we match a preceding dot, only if it's preceded by at least one other dot. Attempting to match on `(\.{2,})?` won't work, because the optional group allows struct field access to match even when one dot is present.

Co-authored-by: Dusty Pomerleau <dustypomerleau@users.noreply.github.com>

editors/code/rust.tmGrammar.json

@@ -1127,7 +1127,7 @@
                 {
                     "comment": "variables",
                     "name": "variable.other.rust",
-                    "match": "\\b(?<!\\.)(?:r#(?!(crate|[Ss]elf|super)))?[a-z0-9_]+\\b"
+                    "match": "\\b(?<!(?<!\\.)\\.)(?:r#(?!(crate|[Ss]elf|super)))?[a-z0-9_]+\\b"
                 }
             ]
         }