Add 76 column reference in git cl upload message

tests/git_cl_test.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.
 
 """Unit tests for git_cl.py."""
 
 import os
 import StringIO
 import stat
@@ skipping 367 matching lines @@
     else:
       find_copies = None
 
     private = '--private' in upload_args
 
     self.calls = self._upload_calls(similarity, find_copies, private)
     def RunEditor(desc, _, **kwargs):
       self.assertEquals(
           '# 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' +
+          '# The first line will also be used as the subject of the review.\n'
+          '#----------------------This line is 76 characters long'
+          '----------------------\n' +
           expected_description,
           desc)
       return returned_description
     self.mock(git_cl.gclient_utils, 'RunEditor', RunEditor)
     def check_upload(args):
       cmd_line = self._cmd_line(final_description, reviewers, similarity,
                                 find_copies, private)
       self.assertEquals(cmd_line, args)
       return 1, 2
     self.mock(git_cl.upload, 'RealMain', check_upload)
@@ skipping 310 matching lines @@
       obj = git_cl.ChangeDescription(orig)
       obj.update_reviewers(reviewers)
       actual.append(obj.description)
     self.assertEqual(expected, actual)
 
 
 if __name__ == '__main__':
   git_cl.logging.basicConfig(
       level=git_cl.logging.DEBUG if '-v' in sys.argv else git_cl.logging.ERROR)
   unittest.main()