Antoine, I looked at your patch and I'm not sure why you applied it
instead of applying mine (or saying +1 on me applying my patch).

Yours uses str.partition which I pointed out is sub-optimal (same big-Oh
but with a larger constant factor) and also adds a function that returns
two things, one of which is thrown away after having a str.strip
performed on it.

If my patch was deficient please let me know.