Meta-q collapses paragraphs within blockquote

[meygerjos]

Minimal example

Initial file:

> Foo
>
> Bar

After M-q, this becomes:

> Foo Bar

This shouldn't happen, because, according to this guide, "the most common way to make a multi-paragraph block quote is to use a greater than symbol on each blank line".

[jrblevin]

Fixed in 858a9bd.