astropy/astropy — pull request #2814 by amras1 (2014-08-03 20:53:55+00:00)
Title: Updated bundled six module to latest version (1.7.3)

Copied directly from [source](https://bitbucket.org/gutworth/six/src/2fe247d5119028c4ab2d7d7a213a04932b457d1f/six.py?at=default).