The summer is officially over. I am staring at a remarkably clean Git branch, my laptop didn't literally take off into orbit (though the CPU fans certainly tried a few times during local CI builds), and I somehow know what git rebase -i does without having to Google it in a cold sweat. If you'd asked me back in May what I was going to be doing, I would have confidently told you I was going to "write tests for Astropy's C extensions." It sounded so neat. So contained. But open source doesn't...