diff -r 5cc7905bccc9 -r 1ffeeb91c55d mercurial/revlog.py
--- a/mercurial/revlog.py	Tue May 31 20:39:04 2011 -0500
+++ b/mercurial/revlog.py	Wed Jun 01 12:38:46 2011 +0200
@@ -1151,7 +1151,7 @@
         try:
             # loop through our set of deltas
             chain = None
-            while 1:
+            while True:
                 chunkdata = bundle.deltachunk(chain)
                 if not chunkdata:
                     break