pcolormesh edgecolor of "None"

[pelson]

#901 implemented a direct check that the edgecolor was not "None", but this excludes the use of "none" (or any other case derivative):

import numpy
import matplotlib.pyplot as plt

plt.subplot(121)
plt.pcolormesh(numpy.arange(12).reshape(3, 4), edgecolors='none')
plt.subplot(122)
plt.pcolormesh(numpy.arange(12).reshape(3, 4), edgecolors='None')
plt.show()

Please consider implementing case insensitive equivalent behaviour.

[mdboom]

I don't think #901 introduced this -- it removed a check (which was case sensitive) and allowed it to pass through to another part of the library (which is also case sensitive). I'm not sure I consider this a bug -- most things in matplotlib are case sensitive.

[efiring]

The relevant code appears to be in Collection.set_edgecolor, which converts everything to lower case. Although in general I prefer case-sensitivity, there are exceptions, and this is one; it is just too hard to remember that something should be "None", and something else should be "none". So, as far as I can see, things are working in a reasonable fashion.