Three Dollar Quill

Okay, the code is updated to produce error reports when a match doubles up on bindings. The only problem with the code as it stands is that it's kind of an abomination. It's a triply-nested multi-line f-string, so I kind of have to try to come up with something better.

Aside from that, the next thing I can do is either to implement more classes from the old version, or get back to trying to set up the documentation. Neither really appeals to me, so maybe I'll try to change gears soon. I'll have to take some time to think about that. For now, I should get ready for bed.

Good night.