Apparently libedit doesn't work in the forked process when the parent
process is run via Launch Services. I cant be bothered to investigate
why, given that libedit is closed source. macOS users will just have to
live without history/completion in the ask kitten until I get around to
writing a replacement for readline/libedit.
And on a personal note, macOS >> Necrotizing fasciitis
Fixes#5447