[PATCH 3 of 4] py3: alias unicode to str on Python 3

[Pulkit Goyal]

# HG changeset patch
# User Pulkit Goyal <7895pulkit at gmail.com>
# Date 1491560884 -19800
#      Fri Apr 07 15:58:04 2017 +0530
# Node ID beedb62e62a78a2f45ef8bd0b72c51f14619ee7f
# Parent  c08552f3a4ab883aac255bc7d8efb7637ba245d8
py3: alias unicode to str on Python 3

diff -r c08552f3a4ab -r beedb62e62a7 mercurial/scmutil.py
--- a/mercurial/scmutil.py	Fri Apr 07 13:46:35 2017 +0530
+++ b/mercurial/scmutil.py	Fri Apr 07 15:58:04 2017 +0530
@@ -36,6 +36,9 @@
 
 termsize = scmplatform.termsize
 
+if pycompat.ispy3:
+    unicode = str
+
 class status(tuple):
     '''Named tuple with a list of files per status. The 'deleted', 'unknown'
        and 'ignored' properties are only relevant to the working copy.