--- a/hgext/obsolete.py	Wed Aug 08 12:59:32 2012 +0200
+++ b/hgext/obsolete.py	Wed Aug 08 13:50:48 2012 +0200
@@ -651,6 +651,8 @@
 
 ### Obsolescence graph
 
+# XXX SOME MAJOR CLEAN UP TO DO HERE XXX
+
 def _precursors(repo, s):
     """Precursor of a changeset"""
     cs = set()