A single-semicolon comment is intended to be very terse and to-the-point. Longer inline comments are supposed to be double-semicolon dedicated to their own line

A single-semicolon comment is intended to be very terse and to-the-point. Longer inline comments are supposed to be double-semicolon dedicated to their own lines. (let* ((head (cons nil nil)) (tail head)) ;; This is a longer expository comment on the following ;; segment of code. Here, we efficiently append to a list by ;; keeping track of the tail node at all times. (dotimes (i 10) ; RPLACD+SETF is an O(1) append (rplacd tail (cons i nil)) (setf tail (cdr tail))) (cdr head)) ; discard dummy cons I don't think this style of commenting is acceptable because of my editor, but just that an editor like Emacs keeps it very easy to edit, organize, and reflow them. I have no shame in saying that I use my editor as an integral part to my programming workflow. :)