mercurial/localrepo.py

--- a/mercurial/localrepo.py	Fri Apr 28 01:13:07 2017 +0530
+++ b/mercurial/localrepo.py	Wed May 03 10:33:26 2017 -0700
@@ -164,7 +164,7 @@
                                           **kwargs)
         cb = util.chunkbuffer(chunks)
 
-        if bundlecaps is not None and 'HG20' in bundlecaps:
+        if exchange.bundle2requested(bundlecaps):
             # When requesting a bundle2, getbundle returns a stream to make the
             # wire level function happier. We need to build a proper object
             # from it in local peer.