--- a/hg.rst	Mon Nov 14 23:49:32 2011 +0200
+++ b/hg.rst	Mon Nov 14 23:50:03 2011 +0200
@@ -410,6 +410,7 @@
 
 Find greatest common ancestor of changesets.
 ============================================
+::
 
   $ hg help revsets
   $ hg log -r "ancestor($rev1,$rev2)"