matplotlib/matplotlib — pull request #2781 by GBillotey (2014-02-01 14:28:31+00:00)
Title: Triplot returns the artist it adds.

Did this because of:
http://stackoverflow.com/questions/20954242/clear-triplot-from-figure

I took also this opportunity to fix triplot calls like:

plt.triplot(triang, 'bo-', ms=9)
which previously didn't work.