Nice! btw, there appears to be a bug with the godbolt link in example 3, causing a lot of URL parameter to explode onto the page. Putting the link in a link reference definition might make it easier, so you don’t need to rely on parentheses matching keeping it correct.
Thanks! Emacs and Hugo disagree over how to parse that one, apparently. Switching to a link reference definition seems to have helped. (I swear I proofread the whole thing before publishing; maybe the problem is that I also changed configuration to let Netlify use their default Hugo version instead of forcing 0.79.1…)