Fix the array format for the gcl diff with no change list case.

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 1147 matching lines @@
 
 
 @attrs(usage='<svn options>')
 def CMDdiff(args):
   """Diffs all files in the changelist or all files that aren't in a CL."""
   files = None
   if args:
     change_info = ChangeInfo.Load(args.pop(0), GetRepositoryRoot(), True, True)
     files = change_info.GetFileNames()
   else:
-    files = GetFilesNotInCL()
+    files = [f[1] for f in GetFilesNotInCL()]
 
   root = GetRepositoryRoot()
   cmd = ['svn', 'diff']
   cmd.extend([os.path.join(root, x) for x in files])
   cmd.extend(args)
   return RunShellWithReturnCode(cmd, print_output=True)[1]
 
 
 @no_args
 def CMDsettings():
@@ skipping 138 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:]))