matplotlib/matplotlib — pull request #1129 by leejjoon (2012-08-21 18:56:01+00:00)
Title: fix drawing error of fancyarrow of simple style

fix drawing error of fancyarrow of simple style when two points are too close.
This addresses #566. And the initial patch was submitted by Rolf Barinka.

Current PR includes a file "examples/pylab_examples/arrow_test.py". I am planning to make it as a test before merge if others find this patch work okay.