button is 'x'

I have sadly created terrible examples 👎 

I should have never posted code that has:
`button is 'x'`

The only time I should be using `is` is with `None`

I thought it always worked on literal strings, but alas, I got BURNED on it badly.  It doesn't work.  I made a bad mistake and still haven't cleaned it up very well.

While your program will work, I suggest changing the is to ==.
