Update issues link to simple-generator

I went from `simple-2` to `simple-generator`, since that was the rename, and I suspect you're capturing issues in the generator repo, where most of the logic is.

This diff also contains a bunch of whitespace changes - my text editor strips trailing whitespace upon save. If that's a problem, I can resubmit, but it doesn't seem like a bad thing. (Add `w=1` to the Github URL to render the diff while ignoring whitespace changes.)