libgit2/pygit2 — pull request #130 by wking (2012-09-13 20:59:16+00:00)
Title: test_repository: fix HEAD_SHA -> 2cdae2 and use assertEqual when testing...

....

The previous test always passed, because bool(HEAD_SHA) is True.

The update to HEAD_SHA should have happened in:

commit c06e10e67e746099b8d454212acc56391199eb31
Author: Petr Hosek
Date: Tue May 29 17:41:07 2012 +0100

Support for diff merge operation added