Add period below review URL when adding review URL footer to committed CLs

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 341 matching lines @@
          'refs/heads/git-cl-commit'],),
        (('', None), 0)),
       ((['git', 'branch', '-D', 'git-cl-commit'],), ''),
       ((['git', 'show-ref', '--quiet', '--verify',
          'refs/heads/git-cl-cherry-pick'],), ''),
       ((['git', 'rev-parse', '--show-cdup'],), '\n'),
       ((['git', 'checkout', '-q', '-b', 'git-cl-commit'],), ''),
       ((['git', 'reset', '--soft', 'fake_ancestor_sha'],), ''),
       ((['git', 'commit', '-m',
          'Issue: 12345\n\nR=john@chromium.org\n\n'
-         'Review URL: https://codereview.example.com/12345'],),
+         'Review URL: https://codereview.example.com/12345.'],),
        ''),
       ((['git', 'config', 'rietveld.force-https-commit-url'],), ''),
       ((['git',
          'svn', 'dcommit', '-C50', '--no-rebase', '--rmdir'],),
        (('', None), 0)),
       ((['git', 'checkout', '-q', 'working'],), ''),
       ((['git', 'branch', '-D', 'git-cl-commit'],), ''),
   ]
 
   @staticmethod
@@ skipping 533 matching lines @@
     self.calls += [
       ((['git', 'apply', '--index', '-p0', '--3way'],), '',
        subprocess2.CalledProcessError(1, '', '', '', '')),
     ]
     self.assertNotEqual(git_cl.main(['patch', '123456']), 0)
 
 if __name__ == '__main__':
   git_cl.logging.basicConfig(
       level=git_cl.logging.DEBUG if '-v' in sys.argv else git_cl.logging.ERROR)
   unittest.main()