◊(Local Yarn Code "Diff")

         racket/string
         racket/file
         racket/system
         "../dust.rkt")

(provide main)

(define (normalize str)
  (define alphanum-only
    (regexp-replace* #rx"[^A-Za-z0-9 ]" str ""))
  (string-normalize-spaces (string-downcase alphanum-only) #px"\\s+" "-"))

(define (make-filename basename)
  (build-path (current-directory) articles-folder (string-append basename ".poly.pm")))

(define (comment . strs)
  (format "◊; ~a" (apply string-append strs)))

(define date-string