autopkg/autopkg — pull request #113 by cmconnelly (2014-08-23 01:03:23+00:00)
Title: Add code to strip alpha characters from front of sparkle:version.

Some apps use sparkle:versions with leading letters; e.g. "v134".
This change removes leading letters, leaving a version number that
can be correctly parsed and sorted by LooseVersion.

One app with this issue is Skim, the PDF viewer.