* Don't render template text (e.g., "Use this template to insert a
note into a page") in feeds.
+ * [[schmonz]] observes this in a dual-feed (one for enclosures,
+ another for browsers) scenario, but not in the typical case.
+ Remaining to be verified: that once migrated to fancypodcast,
+ this stops being a problem.
* Optionally specify the enclosure's:
* MIME type, in case `File::MimeInfo` guesses wrong.
* Duration, in case `ffprobe` guesses wrong.