Tab completion needs a workaround for macOS

[Debilski]

See python/cpython#102130

[…] the Homebrew community has switched to libedit readline as of Python 3.11. There exists a gnureadline package which allows one to continue using the gnu readline, but unfortunately cmd.py will continue to use the libedit one, and that doesn't always work properly.

[Debilski]

Workaround: Add to cmd_completer.py

if 'libedit' in readline.__doc__:
    readline.parse_and_bind("bind ^I rl_complete")
else:
    readline.parse_and_bind("tab: complete")