pull: preindent some code

Next changesets will add support for using stream cloning with bundle2. We
introduce indentation change first for clarity.

mercurial/exchange.py

@@ -1461,6 +1461,7 def _pullbundle2(pullop):
     kwargs['common'] = pullop.common
     kwargs['heads'] = pullop.heads or pullop.rheads
 
+    if True:
     # pulling changegroup
     pullop.stepsdone.add('changegroup')