Update routing guides, root route should be at the top of the file

railties/guides/source/routing.textile

@@ -620,7 +620,7 @@ You can specify what Rails should route +"/"+ to with the +root+ method:
 root :to => 'pages#main'
 </ruby>
 
-You should put the +root+ route at the end of the file. You also need to delete the +public/index.html+ file for the root route to take effect.
+You should put the +root+ route at the top of the file, because it is the most popular route and should be matched first. You also need to delete the +public/index.html+ file for the root route to take effect.
 
 h3. Customizing Resourceful Routes