contains %flow:
http://www.w3.org/TR/html401/interact/forms.html#h-17.7
http://www.w3.org/TR/html4/struct/global.html#edef-DIV
so I'd expect something like
#;6> (sxml->html `(textarea ,(with-output-to-string (lambda () (sxml->html '(div hello))))))
edge cases:
#;10> (sxml->html '(textarea (div (@ (hello "\"what\"")))))
... is irreversible because the browser will map " to " and " to " as well.
#;12> (sxml->html `(textarea ,(with-output-to-string (lambda () (sxml->html '(div (@ (hello "\"what\""))))))))