updated accessibility documentation

examples/switch/switch-checkbox.html

@@ -88,7 +88,7 @@ <h2>Accessibility Features</h2>
           Uses CSS attribute selectors for synchronizing <code>.checked</code> property of the <code>input</code> element with the graphically rendered state.
         </li>
         <li>
-          Uses CSS <code>:hover</code> pseudo-class and <code>onfocus</code>/<code>onblur</code> event handlers for setting/removing a class name for styling visual keyboard focus and hover to make the relationship between the label and the switch perceivable to the user by creating a border around both the switch and the label and also changing the background color.
+          Uses CSS <code>:hover</code> pseudo-class and <code>onfocus</code>/<code>onblur</code> event handlers for setting/removing a class name for styling visual keyboard focus and hover.  The focus styling makes the relationship between the label and the switch perceivable to the user by creating a border around both the switch and the label and also changing the background color.
           <ul>
             <li>
               The focus indicator encompasses both the switch and label to make it easier to perceive when the switch has focus.