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Wraping paragraphs inside blockquotes with quotation marks seems like an odd choice, because:
<p>Dolor sit amet.</p>
would result into something like this:
“Dolor sit amet.””
I don't think that's intended :)
EDIT: I realized that you've just been following instructions from HTML5 Doctor, but now that I opened the issue, we can at least discuss it, because I don't get it :P
I was too shy to post this issue, but I've noticed the same thing. :)
Not sure myself of the best way to handle quotes with multiple paragraphs.
There are tons of ways, but I can't imagine any design that would put quotes around each paragraph. So this setup forces you to cancel those quotes.
I find the blockquote-quotes to be too much of a design decision, and would rather see them removed completely. Wouldn't you just as often want to style your blockquotes with some kind of background, font-size or color to set them apart from their surrounding content, and any automatically inserted quotes would get in the way?
You shouldn’t embed the quotes in your markup that’s what the quotes CSS rule is for :)
Blockquotes should take ‘proper’ quotes (currently English, with half-arsed support for other); if you want to extend their design to make the quotes bigger, use larger quotes etc, then that should be done in your theme stylesheet :)