LISP is very expressive when it comes to documentation
Program Comment
;;;; Describe ProgramStand-Alone Line Comment
(atom 2.22)
;;; Comment that takes its own line
(atom 2.23)Indented Comment
(defun hello-world ()
;; My indented comment
(print "hello world!"))After-Line Comment
(atom 2.15) ; my after-line commentMultiline Comment
#!!
Multiline
comment
!!#