bugfix in `extensions/pre_codefolding.py` for #428 (python2 can't cope with unicode literals in strings)
bugfix in `extensions/pre_codefolding.py` for #428 (python2 can't cope with unicode literals in strings)

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