Enable help generation for some git-cl subcommands

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."""
 
 from distutils.version import LooseVersion
@@ skipping 1551 matching lines @@
     print '\n%s%s  %s%s' % (
         color, message['date'].split('.', 1)[0], message['sender'],
         Fore.RESET)
     if message['text'].strip():
       print '\n'.join('  ' + l for l in message['text'].splitlines())
   return 0
 
 
 def CMDdescription(parser, args):
   """Brings up the editor for the current CL's description."""
+  parser.parse_args(args)
   cl = Changelist()
   if not cl.GetIssue():
     DieWithError('This branch has no associated changelist.')
   description = ChangeDescription(cl.GetDescription())
   description.prompt()
   cl.UpdateDescription(description.description)
   return 0
 
 
 def CreateDescriptionFromLog(args):
@@ skipping 1308 matching lines @@
     parser.error('Unrecognized args: %s' % ' '.join(args))
   cl = Changelist()
   # Ensure there actually is an issue to close.
   cl.GetDescription()
   cl.CloseIssue()
   return 0
 
 
 def CMDdiff(parser, args):
   """shows differences between local tree and last upload."""
+  parser.parse_args(args)
   cl = Changelist()
   issue = cl.GetIssue()
   branch = cl.GetBranch()
   if not issue:
     DieWithError('No issue found for current branch (%s)' % branch)
   TMP_BRANCH = 'git-cl-diff'
   base_branch = cl.GetCommonAncestorWithUpstream()
 
   # Create a new branch based on the merge-base
   RunGit(['checkout', '-q', '-b', TMP_BRANCH, base_branch])
@@ skipping 224 matching lines @@
 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()
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)