Added missing '#'; when starting ipython, I was getting the following message:
Bad key "text.hinting_factor" on line 184 in
/home/marianne/.matplotlib/matplotlibrc.
You probably need to get an updated matplotlibrc file from
http://matplotlib.sf.net/_static/matplotlibrc or from the matplotlib source
distribution
Merge pull request #2178 from mkcor/fix_commentout_mplrc

Commented line which was meant to be commented in the matplotlibrc.template