Change to 72 column reference in git cl upload message

git_cl.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld."""
 
 import json
@@ skipping 846 matching lines @@
         self._description[matches[0].end():]).strip()
     else:
       self.append_footer(new_r_line)
 
   def prompt(self):
     """Asks the user to update the description."""
     self._description = (
       '# Enter a description of the change.\n'
       '# This will be displayed on the codereview site.\n'
       '# The first line will also be used as the subject of the review.\n'
-      '#----------------------This line is 76 characters long'
-      '----------------------\n'
+      '#--------------------This line is 72 characters long'
+      '--------------------\n'
     ) + self._description
 
     if '\nBUG=' not in self._description:
       self.append_footer('BUG=')
     content = gclient_utils.RunEditor(self._description, True,
                                       git_editor=settings.GetGitEditor())
     if not content:
       DieWithError('Running editor failed')
 
     # Strip off comments.
@@ skipping 1214 matching lines @@
   GenUsage(parser, 'help')
   return CMDhelp(parser, argv)
 
 
 if __name__ == '__main__':
   # These affect sys.stdout so do it outside of main() to simplify mocks in
   # unit testing.
   fix_encoding.fix_encoding()
   colorama.init()
   sys.exit(main(sys.argv[1:]))