End Of Review marker

[Ian Booth]

> Reitveld didnt send any comments until you sent them all. Github makes it a
> bit harder to know when you've reached a stopping point. (It also makes it
> a bit hard to start with a "this doesn't look right", and come back and
> remove it when you realize how things are structured.)
>

Yep, that happened to me today. I made a review comment, and later realised it
was a mistake. But by the time I got back to edit/delete it, the author of the
code had already responded to my incorrect comment.