Jean-Noël AVILA [off-list ref] writes:
"Widely accepted", I do not know. I would better frame it as "because at least
four is needed and I'm lazy, then it's four". I'm not expert enough the
asciidoc specification to have a definitive answer of mine, but the
asciidoctor specification says exactly four [1]
We could indeed apply the rule of 4 dashes by default.
Note that this only applies because it is a listing block which does not
accept nesting.
I will reroll.
Thanks. Sounds like a good plan to me.