LISP is very expressive when it comes to documentation
Program Comment
;;;; Describe Program
Stand-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 comment
Multiline Comment
#!!
Multiline
comment
!!#