matplotlib/matplotlib — pull request #1200 by jcmdev0 (2012-09-04 01:16:43+00:00)
Title: Hatch linewidth for pdf and ps backends (#235).

I added a simple rc parameter (hatch.linewidth) that can be used to specify the width of lines in barchart/etc. hatch marks. This was previously submitted to the sourceforge bug tracking system about a year ago.

The hard-coded pdf default linewidth was 0.1pt, the hard-coded ps default was 0pt. The patch sets the default across the two as 0.1pt.