rails/rails_upgrade — pull request #17 by boone (2012-01-18 18:04:21+00:00)
Title: 'send_on' should be 'sent_on'

In the recent commit, the function name does not match the attribute it is searching for. I adjusted this and added a missing test. I also discovered that :date works in lieu of :sent_on in Rails 3, so I added that info.