--- a/tests/test-stack-branch.t	Sat Dec 16 23:40:42 2017 +0100
+++ b/tests/test-stack-branch.t	Tue Jan 16 04:41:48 2018 +0100
@@ -181,6 +181,7 @@
   $ hg add ggg
   $ hg commit -m c_g
   created new head
+  (consider using topic for lightweight branches. See 'hg help topic')
   $ echo aaa > hhh
   $ hg add hhh
   $ hg commit -m c_h