Unpublished review requests keep their summary, description, and diff on the draft, so `rbt info` showed an empty review request. It now shows the draft for unpublished review requests. For published review requests, the draft is shown when the current user is the submitter. A draft diff counts as the newest diff revision, and its commits are listed from the draft commits resource. Testing Done: Ran `rbt info` for an unpublished draft review request.