[PATCH 1 of 3] pycompat: correct the shlex.split() proxy method signature in py3

[Matt Harbison]

# HG changeset patch
# User Matt Harbison <matt_harbison at yahoo.com>
# Date 1519180650 18000
#      Tue Feb 20 21:37:30 2018 -0500
# Node ID 50a2885e94783ecce0820a08dd40d26cadbf0ae1
# Parent  aefb75730ea34f545f0756bf8441fc9ae07bf8dc
pycompat: correct the shlex.split() proxy method signature in py3

diff --git a/mercurial/pycompat.py b/mercurial/pycompat.py
--- a/mercurial/pycompat.py
+++ b/mercurial/pycompat.py
@@ -261,7 +261,7 @@
         return dic
 
     # TODO: handle shlex.shlex().
-    def shlexsplit(s):
+    def shlexsplit(s, comments=False, posix=True):
         """
         Takes bytes argument, convert it to str i.e. unicodes, pass that into
         shlex.split(), convert the returned value to bytes and return that for