org.el (org-ellipsis): Small docstring enhancement

* org.el (org-ellipsis): Small docstring enhancement.

lisp/org.el

@@ -813,10 +813,11 @@ Also apply the translations defined in `org-xemacs-key-equivalents'."
 
 (defcustom org-ellipsis nil
   "The ellipsis to use in the Org-mode outline.
-When nil, just use the standard three dots.  When a string, use that instead,
+When nil, just use the standard three dots.
+When a string, use that string instead.
 When a face, use the standard 3 dots, but with the specified face.
 The change affects only Org-mode (which will then use its own display table).
-Changing this requires executing `M-x org-mode' in a buffer to become
+Changing this requires executing `M-x org-mode RET' in a buffer to become
 effective."
   :group 'org-startup
   :type '(choice (const :tag "Default" nil)