Only trigger reviews on new diff revisions
Review Request #3682 — Created Dec. 18, 2012 and submitted
Only trigger reviews on new diff revisions. Review Bot was firing requests to the review tools on any update to a review request. Until proper support is added for reviewing things other than the diff itself, we'll only fire off requests when a new diff revision is uploaded.
Ran Review Bot with review request updates with and without new diffs, saw the expected behaviour.