Merge pull request jashkenas#2410 from philfreo/master

Removing invalid 'set' option in 'Collection#fetch' docs

index.html

@@ -2055,7 +2055,7 @@ <h2 id="Collection">Backbone.Collection</h2>
       <a href="#Collection-set">set</a> options. For example, to fetch a
       collection, getting an <tt>"add"</tt> event for every new model, and
       a <tt>"change"</tt> event for every changed existing model, without
-      removing anything: <tt>collection.fetch({set: true, remove: false})</tt>
+      removing anything: <tt>collection.fetch({remove: false})</tt>
     </p>
 
     <p>