Handle trivia in code fix forgotten-this

Fixes #21433

src/services/codefixes/fixForgottenThisPropertyAccess.ts

@@ -21,6 +21,8 @@ namespace ts.codefix {
     }
 
     function doChange(changes: textChanges.ChangeTracker, sourceFile: SourceFile, token: Identifier): void {
-        changes.replaceNode(sourceFile, token, createPropertyAccess(createThis(), token));
+        // TODO (https://github.com/Microsoft/TypeScript/issues/21246): use shared helper
+        suppressLeadingAndTrailingTrivia(token);
+        changes.replaceRange(sourceFile, { pos: token.getStart(), end: token.end }, createPropertyAccess(createThis(), token));
     }
 }