Allow the PR author to r- #32
Description
It doesn't come up too often, but I have seen cases where the author realizes they need to make a change after approval. In these cases it would be nice if they could do it right away, without waiting for somebody to do it for them, or to push a dummy commit.
The power in this command is to kill a rollup, but I think abuse potential is pretty low. Better to waste a rollup than to let a whoops into master.
(this may already be current behavior, I haven't looked into it)