diff mercurial/util.py @ 29324:b501579147f1

py3: conditionalize cPickle import by adding in util

The cPickle is renamed to _pickle in python3 and this C extension is available
 in pickle which was not included in earlier versions. So imports are conditionalized
 to import cPickle in py2 and pickle in py3. Moreover the use of pickle in py2 is
 switched to cPickle as the C extension is faster. The hack is added in util.py and
the modules import util.pickle

--- a/mercurial/util.py	Fri Jun 03 21:49:26 2016 +0900
+++ b/mercurial/util.py	Sat Jun 04 14:38:00 2016 +0530
@@ -47,6 +47,7 @@
 
 for attr in (
     'empty',
+    'pickle',
     'queue',
     'urlerr',
     # we do import urlreq, but we do it outside the loop