Run auto-formatter (autopep8) on webkitpy.

third_party/WebKit/Tools/Scripts/webkitpy/common/prettypatch.py

 # Copyright (c) 2010 Google 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
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 13 matching lines @@
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import os
 import tempfile
 
 
 class PrettyPatch(object):
+
     def __init__(self, executive):
         self._executive = executive
 
     def pretty_diff_file(self, diff):
         # Diffs can contain multiple text files of different encodings
         # so we always deal with them as byte arrays, not unicode strings.
         assert(isinstance(diff, str))
         pretty_diff = self.pretty_diff(diff)
         diff_file = tempfile.NamedTemporaryFile(suffix=".html")
         diff_file.write(pretty_diff)
@@ skipping 11 matching lines @@
         prettify_path = os.path.join(pretty_patch_path, "prettify.rb")
         args = [
             "ruby",
             "-I",
             pretty_patch_path,
             prettify_path,
         ]
         # PrettyPatch does not modify the encoding of the diff output
         # so we can't expect it to be utf-8.
         return self._executive.run_command(args, input=diff, decode_output=False)