tractor/nooz/349.trivial.rst

Always redraw the pdbpp prompt on SIGINT during REPL use.

There was recent changes todo with Python 3.10 that required us to pin to a specific commit in pdbpp which have recently been fixed minus this last issue with SIGINT shielding: not clobbering or not showing the (Pdb++) prompt on ctlr-c by the user. This repairs all that by firstly removing the standard KBI intercepting of the std lib's pdb.Pdb._cmdloop() as well as ensuring that only the actor with REPL control ever reports SIGINT handler log msgs and prompt redraws. With this we move back to using pypi pdbpp release.