Add a practracker mode that only regenerates over-broad exceptions
In legacy/trac#32213 (moved), I regenerated the practracker file, and then manually committed the over-broad exceptions.
It would be helpful if we had a
--regen-overbroad option to practracker, that automatically regenerated the improvements we have made.
I feel like this should be easy, it's a combination of
--list-overbroad. But I don't know the practracker design well enough to do it cleanly.