Removed excess whitespace in todoApp index.html file

Author: Jacob Wenger

examples/todoApp/index.html

@@ -6,7 +6,7 @@
     <!-- React -->
     <script src="https://fb.me/react-15.0.1.min.js"></script>
     <script src="https://fb.me/react-dom-15.0.1.min.js"></script>
-    
+
     <!-- Firebase -->
     <script src="https://cdn.firebase.com/js/client/2.4.0/firebase.js"></script>