Running ./util/find-doc-nits -c (you need #9729 to do that), there are over 200 errors. Some of them are false positives, but some are legit. Should find a way to address the false positives, probably via a new =for comment undocumented XXX line or some such.

It would be great if the -c and -l flags were merged into the make doc-nits to prevent future bitrot, once this and #9657 are fixed.