Set comment string, patch by Johnny Chen!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84743 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/emacs/tablegen-mode.el b/utils/emacs/tablegen-mode.el
index 08f7f25..833c16c 100644
--- a/utils/emacs/tablegen-mode.el
+++ b/utils/emacs/tablegen-mode.el
@@ -112,6 +112,8 @@
         )
 
   (set-syntax-table tablegen-mode-syntax-table)
+  (make-local-variable 'comment-start)
+  (setq comment-start "//")
   (run-hooks 'tablegen-mode-hook))       ; Finally, this permits the user to
                                          ;   customize the mode with a hook.