I just got this message when trying to leave a fairly innocuous comment for an [edit on a question][1]:

> [![“Comment reserved for system use. Please use an appropriate comment.”][2]][2]
>
> “Comment reserved for system use. Please use an appropriate comment.”

The only way I could submit this edit was by leaving no comment at all.

What’s happening? That never happened before.


  [1]: https://superuser.com/q/1846810/167207
  [2]: https://i.sstatic.net/65kjKKKB.png