This change was generated using the `autopep8` module [1]. To replicate:
$ pip install --upgrade autopep8
$ cd gecko
$ autopep8 -i -a -a -r testing/mochitest --exclude 'testing/mochitest/pywebsocket/*'
[1] https://github.com/hhatto/autopep8
--HG--
extra : rebase_source : fb127187cd488b977981338373d66cc8c735214f