This line isn't covered. It's in a block `elif rc == XL_SCL:` - in context, I think SCL = scale, i.e. zoom factor?

Again, it's a simple change that I'm confident in. The [docs say](http://docs.python.org/2/library/functions.html#divmod) that `divmod(a, b)[0]` with integers is the same as `a // b`.