Tweak comint docstring to suggest remap bindings

lisp/ChangeLog

+2014-02-02  Daniel Colascione  <dancol@dancol.org>
+
+	* comint.el (comint-prompt-read-only): Change doc to suggest remap keybinding.
+
 2014-02-02  Glenn Morris  <rgm@gnu.org>
 
 	* register.el (register-read-with-preview, point-to-register)

lisp/comint.el

@@ -186,8 +186,8 @@ wish to put something like the following in your init file:
 
 \(add-hook 'comint-mode-hook
 	  (lambda ()
-	    (define-key comint-mode-map \"\\C-w\" 'comint-kill-region)
-	    (define-key comint-mode-map [C-S-backspace]
+	    (define-key comint-mode-map [remap kill-region] 'comint-kill-region)
+	    (define-key comint-mode-map [remap kill-whole-line]
 	      'comint-kill-whole-line)))
 
 If you sometimes use comint-mode on text-only terminals or with `emacs -nw',