◊(Local Yarn Code "Diff")

        [else tx]))

;; Footnotes
;;
;; Private use:
(define fn-names null)
(define fn-definitions (make-hash))
(define (fn-id x) (string-append x "_fn"))
(define (fndef-id x) (string-append x "_fndef"))
(define (fn-id x) (here-id (string-append x "_fn")))
(define (fndef-id x) (here-id (string-append x "_fndef")))

;; Provided footnote tag functions:
(define (html-fn . args)
  (define name (format "~a" (first args)))
  (set! fn-names (cons name fn-names))
  (let* ([def-anchorlink (string-append "#" (fndef-id name))]
         [nth-ref        (number->string (count (curry string=? name) fn-names))]