commits: 5ddfee6b194f8bdce8bb42cddfabe3e1c142ef16

This data as json

sha	message	author_date	committer_date	raw_author	raw_committer	repo	author	committer
5ddfee6b194f8bdce8bb42cddfabe3e1c142ef16	Fix DataArray.groupby().reduce() mutating input array (#2169) * Fix DataArray.groupby().reduce() mutating input array Fixes GH2153 * Fix test failure	2018-05-29T03:15:07Z	2018-05-29T03:15:07Z	f10b21bed2846b879806f87039b77245b18e7671	cd792325681cbad9f663f2879d8b69f1edbb678f	13221727	1217238	19864447