Another fenced div + blockquote edge case (vs. Pandoc)

[Omikhleia]

This doesn't parse as a fenced div:

::: {lang=fr}
> Cette citation est en français!
:::

Workaround is to have a blank line after the blockquote:

::: {lang=fr}
> Cette citation est en français!

:::

Pandoc parses the first syntax, though, without issue.

[Witiko]

More specifically, lunamark fails to recognize the fenced div, not the blockquote:

$ lunamark -Xfenced_divs <<-EOF
::: {lang=fr}
> Cette citation est en français!
:::
EOF

<p>::: {lang=fr}</p>

<blockquote>
<p>Cette citation est en français! :::</p>
</blockquote>

This indicates that even though we have added an exception that allows the end tag (:::) to break out of a paragraph, our exception fails to apply for blockquote continuation lines.

@Omikhleia, would you like to tackle this?