#;1> (use lowdown lowdown-extra)
;; loading ...
#;2> (markdown->sxml "hey ^[waht's up]?")
((p "hey" (#\space) "^" ("[" "waht" "'" "s" (#\space) "up" "]") "?"))
#;3> (enable-lowdown-extra!)
#;4> (markdown->sxml "hey ^[waht's up]?")
((p "hey" (#\space) (span (@ (class "note")) "waht" "'" "s" (#\space) "up") "?"))
#;5>