Is output clean when redirected ?

[ewjoachim]

I haven't tested it, but I wonder what the output looks like when not connected to a TTY. I believe colorama behavies itself, and doesn't output colors. Though, we also do a fair share of line rewriting and we should maybe avoid this.

Note: I believe sys.stdout.isatty might be helpful, but there's maybe something more advanced in click or colorama to help us.