pycompat: add xrange alias for Python 2
We assign xrange on Python 3 but not Python 2. Adding the missing
symbol on Python 2 allows us to use `pycompat.xrange` to get a
generator range function.
Differential Revision: https://phab.mercurial-scm.org/D4031
--- a/mercurial/pycompat.py Tue Jul 31 19:37:54 2018 +0200
+++ b/mercurial/pycompat.py Wed Aug 01 12:57:15 2018 -0700
@@ -331,6 +331,7 @@
else:
import cStringIO
+ xrange = xrange
unicode = unicode
bytechr = chr
byterepr = repr