Strip the superscript-1 character at the end, I'm surprised HNs link formatter regex detects it as part of the link: https://tug.org/TUGboat/tb08-1/tb17knutmix.

Strip the superscript-1 character at the end, I'm surprised HNs link formatter regex detects it as part of the link: https://tug.org/TUGboat/tb08-1/tb17knutmix.pdf https://tug.org/TUGboat/tb08-1/tb17knutmix.pdf