~~ lineWidth: 40 ~~
!! should format !!
> First line.
> Second line.

[expect]
> First line.
> Second line.

!! should not wrap a line when it exceeds the line width and text wrapping is to maintain !!
> First line that goes very very very long.

[expect]
> First line that goes very very very long.

!! should keep blank lines in the middle !!
>
> First
>
> Second
>
>
> Third
>
>

[expect]
> First
>
> Second
>
> Third