puppetlabs/puppetlabs-apt — pull request #398 by irconan (2014-12-14 21:26:52+00:00)
Title: Separate apt::pin for apt::backports to allow pin by release instead of ...

Currently apt::backports creates a ineffective pin when using debian 7 because backports and the main repo share an origin. Pinning by release can, for this reason, be more reliable for backports.