Manual on website doesn't render ipv6 addresses right
I couldn't immediately reproduce the issue locally, will have to investigate. To see what I mean:
To specify all IPv4 and IPv6 internal and link-local networks (including 0.0.0.0/8, 169.254.0.0/16, 127.0.0.0/8, 192.168.0.0/16, 10.0.0.0/8, 172.16.0.0/12, [::]/8, /7, /10, /10, /8, and [::]/127), you can use the "private" alias instead of an address. ("private" always produces rules for IPv4 and IPv6 addresses, even when used with accept6/reject6.)