matplotlib/matplotlib — pull request #895 by pelson (2012-05-23 16:40:39+00:00)
Title: Making horizontal & vertical hatches in agg look better.

Fixes ugly non-equal width lines in the hatch pattern of agg images. Simple example of producing the desired hatches:

```
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
ax = plt.axes()
patch = mpatches.Rectangle([0, 0], 1, 1, transform=ax.transAxes, hatch='-|', facecolor='none')
ax.add_patch(patch)
plt.show()
```

Note: This is likely to change some test images, but I can't meaningfully test due to the number of failures I get.