Clarify class-based helper format documentation.
Clarify class-based helper format documentation.

Fixes #1318.

Also-by: Dig <db0f7daf3379120050645d138fd7de2e51a6703b@locusenergy.com>

bmac/guides,MarkMT/guides,bmac/guides,tleskin/guides,davidpett/guides,jkarsrud/guides,nicobot/guides,nicobot/guides,davidpett/guides,skaterdav85/guides,knownasilya/guides,jkarsrud/guides,skaterdav85/guides,tleskin/guides,davidpett/guides,ubuntuvim/guides,boztek/guides,HeroicEric/guides,ubuntuvim/guides,davidpett/guides,knownasilya/guides,MarkMT/guides,ubuntuvim/guides,skaterdav85/guides,ubuntuvim/guides,skaterdav85/guides,boztek/guides,jkarsrud/guides,boztek/guides,MarkMT/guides,HeroicEric/guides,knownasilya/guides,MarkMT/guides,tleskin/guides,HeroicEric/guides,jkarsrud/guides,bmac/guides,nicobot/guides,bmac/guides,knownasilya/guides