+;; Regexp matching
+
+;; There is limited provision for regexp matching within iswitchb,
+;; enabled through `iswitchb-regexp'. This allows you to type `c$'
+;; for example and see all buffer names ending in `c'. This facility
+;; is quite limited though in two respects. First, you can't
+;; currently type in expressions like `[0-9]' directly -- you have to
+;; type them in when iswitchb-regexp is nil and then toggle on the
+;; regexp functionality. Likewise, don't enter an expression
+;; containing `\' in regexp mode. If you try, iswitchb gets confused,
+;; so just hit C-g and try again. Secondly, no completion mechanism
+;; is currently offered when regexp searching.
+