Run auto-formatter (autopep8) on webkitpy.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/executive.py

 # Copyright (c) 2009, Google Inc. All rights reserved.
 # Copyright (c) 2009 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 51 matching lines @@
             message = 'Failed to run "%s"' % repr(script_args)
             if exit_code:
                 message += " exit_code: %d" % exit_code
             if cwd:
                 message += " cwd: %s" % cwd
 
         if shortened_output:
             message += "\n\noutput: %s" % shortened_output
 
         Exception.__init__(self, message)
-        self.script_args = script_args # 'args' is already used by Exception
+        self.script_args = script_args  # 'args' is already used by Exception
         self.exit_code = exit_code
         self.output = output
         self.cwd = cwd
 
     def message_with_output(self):
         return unicode(self)
 
     def command_name(self):
         command_path = self.script_args
         if type(command_path) is list:
@@ skipping 395 matching lines @@
             pool.close()
             pool.join()
 
 
 def _run_command_thunk(cmd_line_and_cwd):
     # Note that this needs to be a bare module (and hence Picklable) method to work with multiprocessing.Pool.
     (cmd_line, cwd) = cmd_line_and_cwd
     proc = subprocess.Popen(cmd_line, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     stdout, stderr = proc.communicate()
     return (proc.returncode, stdout, stderr)