By default the variable is initialized to #\'
If I want to change it to #\" via local binding I still get the single quotes in the resulting string.

(let ((*attribute-quote-char* #\"))
(with-html-output-to-string (*standard-output* nil :prologue nil :indent nil)
    (:html
     (:head
      (:title "title")
      (:meta :name "DESCRIPTION" :content "description")
      (:meta :name "KEYWORDS" :content "keywords")))))

I get:
"<html><head><title>title</title><meta name='DESCRIPTION' content='description' /><meta name='KEYWORDS' content='keywords' /></head></html>"

Is it possible to make a local new binding or I should change it only globally?

Thank you,
Andrew