Fix uninitialized variable error in presubmit_support

presubmit_support.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.
 
 """Enables directory-specific presubmit checks to run at upload and/or commit.
 """
 
 __version__ = '1.6.2'
 
@@ skipping 1281 matching lines @@
 def CallCommand(cmd_data):
   # multiprocessing needs a top level function with a single argument.
   cmd_data.kwargs['stdout'] = subprocess.PIPE
   cmd_data.kwargs['stderr'] = subprocess.STDOUT
   try:
     (out, _), code = subprocess.communicate(cmd_data.cmd, **cmd_data.kwargs)
     if code != 0:
       return cmd_data.message('%s failed\n%s' % (cmd_data.name, out))
   except OSError as e:
     return cmd_data.message(
-        '%s exec failure\n   %s\n%s' % (cmd_data.name, e, out))
+        '%s exec failure\n   %s' % (cmd_data.name, e))
 
 
 def Main(argv):
   parser = optparse.OptionParser(usage="%prog [options] <files...>",
                                  version="%prog " + str(__version__))
   parser.add_option("-c", "--commit", action="store_true", default=False,
                    help="Use commit instead of upload checks")
   parser.add_option("-u", "--upload", action="store_false", dest='commit',
                    help="Use upload instead of commit checks")
   parser.add_option("-r", "--recursive", action="store_true",
@@ skipping 70 matching lines @@
   except PresubmitFailure, e:
     print >> sys.stderr, e
     print >> sys.stderr, 'Maybe your depot_tools is out of date?'
     print >> sys.stderr, 'If all fails, contact maruel@'
     return 2
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   sys.exit(Main(None))