Add a $CtrlSym group to the latex language (#12919)

GitOrigin-RevId: 4ee8ba7fe85f37dbe4cab04dae699b2a66007a2d

services/web/frontend/js/features/source-editor/languages/latex/latex-language.ts

@@ -106,6 +106,9 @@ export const LaTeXLanguage = LRLanguage.define({
           Tokens.ctrlSym.includes(type.name)
         ) {
           types.push('$CtrlSeq')
+          if (Tokens.ctrlSym.includes(type.name)) {
+            types.push('$CtrlSym')
+          }
         } else if (Tokens.envName.includes(type.name)) {
           types.push('$EnvName')
         } else if (type.name.endsWith('Argument')) {