Which comma style does the FreeBSD handbook use? Or is that up to individual contributors and editors?

[Benjamin Kaduk]

On Sat, Oct 05, 2019 at 05:02:28PM +0000, Pau Amma wrote:
> I've seen examples of both styles in the handbook, eg
> https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/audit-administration.html
> and
> https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-usb-tethering.html,
> so I'm unsure.
> 
> Important note: I'm only asking which one (if not both) the FreeBSD
> handbook is actually using. All arguments about what it should use
> (instead) or which style is better will be cheerfully ignored.

https://www.freebsd.org/doc/en_US.ISO8859-1/books/fdp-primer/writing-style-guidelines.html
says "use the serial comma".

-Ben