style-guide fixes in config/main
style-guide fixes in config/main

ipython-contrib/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,jbn/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,jbn/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,jbn/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,jbn/IPython-notebook-extensions