Fix grammar

Author: jakezatecky

examples/src/index.html

@@ -84,8 +84,8 @@ <h2>Hide Checkboxes Example</h2>
 
       <h2>Expand All/Collapse All Example</h2>
       <p>
-        By passing in the <code>showExpandAll</code> property, two additional options will appear at the top of the tree
-        allow the user to easily expand or collapse all parent nodes.
+        By passing in the <code>showExpandAll</code> property, two additional buttons will appear at the top of the tree
+        that allow the user to easily expand or collapse all nodes.
       </p>
       <div id="expand-all-example"></div>