Thank you, that seems usable

For me, if i start typing something, and hit tab, it gets completed

This i expected

But if I only type tab, nothing happens until I hit tab again, at which point a newline is printed, then the available tab choices and a newline, then the prompt again

This i didn't expect, I kinda expected it to cycle through list of completions, like cmd.exe does for filenames, like my demo from earlier, with shift+tab going in reverse (as is common, but which my version doesn't do)

At least it usable