More examples at the end of trychange.py help and move the -R flag to the right group

gcl.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 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.
 
 """\
 Wrapper script around Rietveld's upload.py that simplifies working with groups
 of files.
 """
 
@@ skipping 853 matching lines @@
     trychange_args.extend(['--name', change_info.name])
     if change_info.issue:
       trychange_args.extend(["--issue", str(change_info.issue)])
     if change_info.patchset:
       trychange_args.extend(["--patchset", str(change_info.patchset)])
     trychange_args.extend(args)
     file_list = change_info.GetFileNames()
   else:
     trychange_args.extend(args)
     file_list = None
-  return trychange.TryChange(trychange_args,
-                             file_list=file_list,
-                             swallow_exception=swallow_exception,
-                             prog='gcl try')
+  return trychange.TryChange(
+      trychange_args,
+      file_list=file_list,
+      swallow_exception=swallow_exception,
+      prog='gcl try',
+      extra_epilog='\n'
+          'When called from gcl, use the format gcl try <change_name>.\n')
 
 
 @need_change_and_args
 @attrs(usage='[--no_presubmit]')
 def CMDcommit(change_info, args):
   """Commits the changelist to the repository."""
   if not change_info.GetFiles():
     print "Nothing to commit, changelist is empty."
     return 1
   if not OptionallyDoPresubmitChecks(change_info, True, args):
@@ skipping 422 matching lines @@
     argv = ['help']
   command = Command(argv[0])
   if command:
     return command(argv[1:])
   # Unknown command, try to pass that to svn
   return CMDpassthru(argv)
 
 
 if __name__ == "__main__":
   sys.exit(main(sys.argv[1:]))