org modern test

;; Taken from the well-structured Emacs config by @oantolin.
;; Take a look at https://github.com/oantolin/emacs-config!
(defun command-of-the-day ()
  "Show the documentation for a random command."
  (interactive)
  (let ((commands))
      (mapatoms (lambda (s) (when (commandp s) (push s commands))))
      (describe-function (nth (random (length commands)) commands))))

taylor(sin(x),x=0,3)

printf("a|b\nc|d\n");