On the last page of the article Problem Report Handling Guidelines https://www.freebsd.org/doc/en_US.ISO8859-1/articles/pr-guidelines/references.html is a footer. Great. If you read this small article as a single HTML page, the footer is missing https://www.freebsd.org/doc/en_US.ISO8859-1/articles/pr-guidelines/article.html It looks like a corrupted page (but isn't). I think that the single HTML page should have an standard footer as well.
Fixed with the migration to Hugo/AsciiDoctor and with the new Documentation Portal.