Okay, I uncommented a bunch of the tests. The ones that are still commented are either not expected to work, or they're so broken that it's not really useful to run them right now.
Some of them never worked, like `iter` or `sweet-expressions`, because I haven't implemented that functionality yet. I still wanted the tests there so when I do implement them, I'll be able to get a quick yes/no as to whether Arubic matches the expectations or not.
Some of them, however, used to work and now don't. `macex` is an example of that. In the case of macex, the problem is that I changed Arubic, but didn't update the tests... they're out of sync. So it's commented out until I clean it up.
