keyword: avoid os import by using util.splitpath

hgext/keyword.py

@@ -82,7 +82,7 b' from mercurial import commands, cmdutil,'
 from mercurial import patch, localrepo, templater, templatefilters, util
 from mercurial.node import *
 from mercurial.i18n import _
-import re, shutil, tempfile, time, os
+import re, shutil, tempfile, time
 
 commands.optionalrepo += ' kwdemo'
 
@@ -425,7 +425,7 b' def reposetup(ui, repo):'
 
     try:
         if (not repo.local() or hgcmd in nokwcommands.split() 
-            or '.hg' in repo.root.split(os.sep)
+            or '.hg' in util.splitpath(repo.root)
             or repo._url.startswith('bundle:')):
             return
     except AttributeError: