input against raw_input is not really explicit

[gnunicorn]

I had a few people running into problems with the whole input vs. raw_input. And because the code itself worked but then it broke when the user typed stuff in, it wasn't obvious to me as a coach, why this is breaking. Instead of using raw_input a few actually typed "left" with quotes and it worked. But is weird.

[Ivoz]

Well "left" given to python 2's input() is equivalent to left given to python 3's input(), so it makes sense. I thought the note should be pretty clear - is there anything you can suggest we could do to clarify?