family.py: bump and remove put the holder back when a hook, a lock or git refuses them after they write, and say what they put back or what is left with the commands that put it back; they ask first what their dry runs ask first; and remove refuses a held index.lock before it unmounts and a .gitmodules that gives the member's path to two submodules, of which git rm took out one (#365, #360) - #416