Error on install

[fusionlove]

My Gist button disappeared literally overnight along with the Edit Presentation/ Show Presentation buttons. On trying to reactivate the extension I had the error

ValueError: Expecting ',' delimiter: line 8 column 3 (char 115)

but deleting ~/anaconda2/etc/jupyter/jupyter_notebook_config.json had no effect - same thing!

Jupyter version 4.3.0

[fusionlove]

Fixed by running the snippet from here

ipython-contrib/jupyter_contrib_nbextensions#1295

which located a missing comma in nbconfig/notebook.json. Somehow the comma disappeared literally overnight!