old_contents: 		var ratIcon = L.icon({
  			iconUrl: 'http://maptimeboston.github.io/leaflet-intro/rat.png',
  			iconSize: [60,50]
  		});
  
new_contents: var pointIcon = L.icon({
  	iconUrl: 'http://maptimeboston.github.io/leaflet-intro/rat.png',
  	iconSize: [60,50]
  });
  
subject: Update rat_v1.js