tweaking wording

index.html

@@ -925,8 +925,7 @@ alert("Dessert will be " + (new Meal).get('dessert'));
     <p class="warning">
       Remember that in JavaScript, objects are passed by reference, so if you
       include an object as a default value, it will be shared among all instances. 
-      Defaults containing objects passed by reference should be defined using a 
-      function if you do not wish to share these objects between all instances.
+      Instead, define <b>defaults</b> as a function.
     </p>
 
     <p id="Model-toJSON">