;; syntax and string syntax are both delimited by `"'s and behave
;; according to their name. With the `string' syntax there's no need
;; to escape the backslashes and double quotes simplifying the editing
-;; somewhat. The other three allow editing of symbolic regular
-;; expressions supported by the packages of the same name.
+;; somewhat. The `rx' syntax allows editing of symbolic regular
+;; expressions supported by the package of the same name.
;; Editing symbolic expressions is done through a major mode derived
;; from `emacs-lisp-mode' so you'll get all the good stuff like