diff -r 9cb950276d27 -r 770128405002 mercurial/commands.py
--- a/mercurial/commands.py	Sun Aug 21 12:33:57 2016 +0900
+++ b/mercurial/commands.py	Sun Aug 21 12:36:23 2016 +0900
@@ -3511,7 +3511,8 @@
                                                              numdeltas))
 
 @command('debugrevspec',
-    [('', 'optimize', None, _('print parsed tree after optimizing')),
+    [('', 'optimize', None,
+      _('print parsed tree after optimizing (DEPRECATED)')),
      ('p', 'show-stage', [],
       _('print parsed tree at the given stage'), _('NAME')),
      ],