also uncommented .idea/ (JetBrains config directory) in .gitignore... GitHub's stock Python .gitignore template calls this a "nuclear option", but it's really not since we aren't trying to maintain a consistent dev environment across users. I just wanted to run my solution through the PyCharm debugger to figure out what I was doing wrong* so the folder the folder got created when I set up an interpreter.

* (I had an elif instead of an if that was causing the right child to never be searched if the left child existed🤦)