vim-patch:9.2.0007: cindent: recognizing labels within commented lines

Problem:  Comment lines which start like a label are recognized as a
          label and indented based on that.
Solution: Check if the position is in a comment after recognizing a label
          in cin_islabel (Anttoni Erkkilä)

closes: vim/vim#19397

9af18686c7

Co-authored-by: Anttoni Erkkilä <anttoni.erkkila@protonmail.com>

src/nvim/indent_c.c

@@ -370,6 +370,9 @@ static bool cin_islabel(void)  // XXX
     return false;
   }
 
+  if (ind_find_start_CORS(NULL)) {
+    return false;  // Don't accept a label in a comment or a raw string.
+  }
   // Only accept a label if the previous line is terminated or is a case
   // label.
   pos_T cursor_save;