BACKLINK_TEXT specifies the text that's used in the link at the end of
the footnote to link back up to the reader's place. It still defaults to
Okay, so at first I had an uncessarily complicated commit for this and
submitted a pull request. Waylan showed me a better way to do it, here:
So I made another commit and added it to the pull request. But then I
accidentally added yet another commit to the pull request, accidentally.
Since then, I've realized it would be best to start with a new branch
and closed that first pull request.
Hopefully this will be the last try.