('"") ; using a raw string for the doctype is fine
(html
(head
; everything that belongs in the head element
(title'"Document")
(meta (: "charset" "UTF-8"))
(meta (: "name" "viewport") (: "content" "width=device-width, initial-scale=1.0"))
(meta (: "http-equiv" "X-UA-Compatible") (: "content" "ie=edge"))
(link (: "rel" "stylesheet") (: "href" "#")))
(body
; the actual body only starts here
(span (: "style" "color: red") ('"Hello, world!"))))