I don't think the original notes do, but there is this comment by the owner of the gist: "FWIW: I didn't produce the content present here. I've just copy-past

I don't think the original notes do, but there is this comment by the owner of the gist: "FWIW: I didn't produce the content present here. I've just copy-pasted it from somewhere over the Internet, but I cannot remember exactly the original source. I was also not able to find the author's name, so I cannot give him/her the proper credit." How convenient? It was copy/pasted from somewhere, but oops, can't remember where or who wrote it, oh well, I'll just put it under my name :)