Remove trailing '\n' from last-upload-hash brnach property.

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 1343 matching lines @@
       print ('Uploading will still work, but if you\'ve uploaded to this issue '
             'from another machine or branch the patch you\'re uploading now '
             'might not include those changes.')
       ask_for_data('About to upload; enter to confirm.')
 
   print_stats(options.similarity, options.find_copies, args)
   if settings.GetIsGerrit():
     return GerritUpload(options, args, cl)
   ret = RietveldUpload(options, args, cl)
   if not ret:
-    git_set_branch_value('last-upload-hash', RunGit(['rev-parse', 'HEAD']))
+    git_set_branch_value('last-upload-hash',
+                         RunGit(['rev-parse', 'HEAD']).strip())
 
   return ret
 
 
 def IsSubmoduleMergeCommit(ref):
   # When submodules are added to the repo, we expect there to be a single
   # non-git-svn merge commit at remote HEAD with a signature comment.
   pattern = '^SVN changes up to revision [0-9]*$'
   cmd = ['rev-list', '--merges', '--grep=%s' % pattern, '%s^!' % ref]
   return RunGit(cmd) != ''
@@ skipping 592 matching lines @@
              'and retry or visit go/isgaeup.\n%s') % (e.code, str(e)))
 
   # Not a known command. Default to help.
   GenUsage(parser, 'help')
   return CMDhelp(parser, argv)
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   sys.exit(main(sys.argv[1:]))