# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2016-08-05 19:35:02
# Node ID 0806fa2a39d8f06e8ce03f6d2cd0ae9f6a1566f4
# Parent  8d1cdee372e6585b053ca90b9129895dcc692dff

revlog: use `iter(callable, sentinel)` instead of while True

This is functionally equivalent, but is a little more concise.

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -1585,10 +1585,7 @@ class revlog(object):
         try:
             # loop through our set of deltas
             chain = None
-            while True:
-                chunkdata = cg.deltachunk(chain)
-                if not chunkdata:
-                    break
+            for chunkdata in iter(lambda: cg.deltachunk(chain), {}):
                 node = chunkdata['node']
                 p1 = chunkdata['p1']
                 p2 = chunkdata['p2']