Emphasis with `_`

[John Gruber]

Kyle Maxwell <krmaxwell at gmail.com> wrote on 05/24/05 at 9:53 pm:

> What I meant was, how often do folks use the underscores for marking
> up (as opposed to using the asterisk pairs instead)?

Lots.

I don't know if it's more popular than the asterisks (it could be),
but at the very least it's popular enough that I'm quite confident
it was the right decision to support both _this_ and *this*
synonymously.

-J.G.