diff -r 7a3f715dfa90 -r d9e3f5055772 mercurial/commands.py
--- a/mercurial/commands.py	Sat Nov 01 18:28:54 2014 +0100
+++ b/mercurial/commands.py	Sat Nov 01 19:02:31 2014 +0100
@@ -3837,7 +3837,7 @@
 
     section = None
     if name and '.' in name:
-        name, section = name.split('.')
+        name, section = name.split('.', 1)
 
     text = help.help_(ui, name, **opts)