A while ago, I added an Atom feed for this gopherlog. I made a mistake
in the script that creates it, whoops. The entry IDs were not conforming
to the tag URI spec:

https://taguri.org/

I fixed that now.

I just checked my server's logs and, to my surprise, people really do
fetch that feed. :-)  As to not cause duplicates, old IDs will remain
the same (i.e., slightly broken), only new IDs will be correct.

(That's also an indication of how little it matters. Feed readers are
very forgiving in that regard.)

While we're at it, the script now also properly escapes <, >, and &, and
some indentation issues were fixed.