rubygems/rubygems — pull request #220 by ctcherry (2011-11-20 21:25:57+00:00)
Title: Allow group writable if umask inclues it already.

Commit 38c534187819528ea132320cdaf9533b545e47b7 mentions removing world-writable permission, which is a great idea. However, it also removes group-writable permissions which is a problem for a shared environment. This patch leaves the group permissions of the umask alone.