alphagov/whitehall — pull request #444 by chrismdp (2013-04-15 13:19:38+00:00)
Title: Export with 301 if document has ever been published

Ensure that if subsequent drafts of a document are created, we keep on
returning 301s: the document has existed on the web in some form and
therefore we should always redirect.

https://www.pivotaltracker.com/story/show/47368033