provide info on what filtering was performed

[mreinstein]

it would be super helpful to have a way to identify what was cleaned out of a string. For the sake of an auditing trail, I'd love to be able to see this, and it'd be useful in a review workflow (verifying that the automated bad word filter didn't throw false positives.

Would you be open to a PR for this? happy to put one together.

[web-mech]

I'd be happy to accept a PR for this 👍