dahlia/wand — pull request #181 by jpscaletti (2014-05-09 00:07:20+00:00)
Title: Accepts both image/gif and image/x-gif as valid GIF mimetypes

A lot of real-world gifs has the old-but-valid mimetype "image/x-gif" (for example, **all** of the gifs on this page: https://www.tumblr.com/tagged/gif). This patch allows Wand to detect those files as animated.