Strictly speaking not all of those _need_ to be touched given the old name is always going to exist for backwards compatibility.  But I agree that we should update them as part of this regardless.

I'd go forward with a PR.

The only fallout I expect a change like this to have on users is in the very odd test scenario where someone has hardcoded the error name in a string.  That is rare, especially for an re.error which is generally not an expected exception.