-with two or fewer are not.
-
-Another use for triple-semicolon comments is for commenting out lines
-within a function. We use three semicolons for this precisely so that
-they remain at the left margin. By default, Outline minor mode does
-not consider a comment to be a heading (even if it starts with at
-least three semicolons) if the semicolons are followed by at least two
-spaces. Thus, if you add an introductory comment to the commented out
-code, make sure to indent it by at least two spaces after the three
-semicolons.
-
-@smallexample
-(defun foo (a)
-;;; This is no longer necessary.
-;;; (force-mode-line-update)
- (message "Finished with %s" a))
-@end smallexample
+with two or fewer are not. Historically, triple-semicolon comments have
+also been used for commenting out lines within a function, but this use
+is discouraged.