A number of feed.xml files is generated, so that works. However, I also want to have a rel=alternate link in my header, and I don’t exactly know how, but I tried this:
git clone --single-branch -b hugo-forum-topic-52453 https://github.com/jmooring/hugo-testing hugo-forum-topic-52453
cd hugo-forum-topic-52453
hugo
head public/index.html
Perhaps what you meant to say was, “Thank you for spending some of your free time looking into my issue this weekend.”
You can either compare what you have done with the working example I provided, or provide a link to a repository that reliably reproduces your problem.