[Haskell-cafe] multiline strings editor for emacs

Dear Cafe, searched, but this didn't turn up anything -- does there exist a "multiline string editor for emacs" in haskell? I.e something that would pop-out a new buffer to edit the string, and that would be inserted and slash-aligned back into the original file once done? This would be simple enough to implement, perhaps someone has already done it? (And just to be sure: there isn't a built-in multiline quasiquoter in base, right? I know that there are multitudes of packages that implement this, but would just like something that is built in.) Thanks! -- Markus Läll