matplotlib/matplotlib — pull request #3462 by tomspur (2014-09-03 11:52:24+00:00)
Title: Add legend.framealpha to matplotlibrc

So far it is only referenced in lib/matplotlib/axes/_axes.py:legend()
and this commit finally adds it to matplotlibrc.

My graphs suddently had legends, where the grid from behind was shining through. This commit fixes that for me.