puppetlabs/puppet-acceptance — pull request #232 by justinstoller (2012-06-07 19:18:49+00:00)
Title: (maint) dont backup non-existent files

Previously the --pkg-repo option was backing up apt.conf to use the new proxy. In doing so it was assuming that all ubuntu vms have an existing apt.conf file. This isn't true for the new Precise vms. Now the step will check for the existence of the file before trying to back it up.