Changing the definition of Exclusion area to be defined by the exclusion

box and not exlucions element.

Author: ratan@microsoft.com

css3-exclusions/Exclusions.src.html

@@ -130,7 +130,7 @@ <h2 id="definitions">Definitions</h2>
         </div>
     </div>
     <p>
-        The area used for excluding inline flow content around an exclusion element. The
+        The area used for excluding inline flow content around an exclusion box. The
         exclusion area is equivalent to the <a href="http://www.w3.org/TR/CSS2/box.html#box-dimensions">
         border box</a>.
         This specification's