alphagov/specialist-publisher — pull request #356 by Themitchell (2014-12-09 12:30:21+00:00)
Title: Copy updated_at to public_updated_at for editions

copy the existing updated_at to public_updated_at without touching the updated_at.

This will mean all documents after this migration will use the new default functionality for
setting public_updated_at on major/minor updates.