pyflakes: use pycompat.pickles to prevent error
The pyflakes in my test box complain about pickle in pycompat.
mercurial/pycompat.py:17: 'pickle' imported but unused
--- a/mercurial/pycompat.py Tue Jun 21 06:29:23 2016 -0700
+++ b/mercurial/pycompat.py Fri Jun 24 02:04:43 2016 +0200
@@ -15,6 +15,7 @@
pickle.dumps
except ImportError:
import pickle
+ pickle.dumps # silence pyflakes
try:
import cStringIO as io