diff -r 9585fac76d2d -r 304232cc14b6 hgext3rd/topic/discovery.py
--- a/hgext3rd/topic/discovery.py	Wed Jun 28 18:18:59 2017 +0200
+++ b/hgext3rd/topic/discovery.py	Wed Jun 28 17:38:04 2017 +0200
@@ -99,6 +99,7 @@
     return data
 
 def handlecheckheads(orig, op, inpart):
+    """This is used to check for new heads when publishing changeset"""
     orig(op, inpart)
     if op.repo.publishing():
         return