commits: cb8403487d50f529166cd11e8925def1fbe708f5

This data as json

sha	message	author_date	committer_date	raw_author	raw_committer	repo	author	committer
cb8403487d50f529166cd11e8925def1fbe708f5	Change to issue #532. Pulled the "if ... is None" out of the loop and always convert drop_variables to a set.	2015-08-19T14:36:07Z	2015-08-19T14:36:07Z	3d31dc993d42caf8759b3e6b4ae53c1b93dc53bf	3d31dc993d42caf8759b3e6b4ae53c1b93dc53bf	13221727	6883049	6883049