I haven't looked at all the places where `:message` is used (`warn_deprecation` ? Anywhere else?), but it looked to me as though the places which use that are naturally limited by where they occur, and those messages have call site information that would prevent them from being seen as repeating.

Do you have thoughts about how to match those messages? Just using the first line, or some other arbitrary substring? Is it worth it to catch those here also?