Updated Use Cases (markdown)

Use-Cases.md

@@ -92,6 +92,7 @@ In my alternative, and based on my comments for the previous use-case, the app w
 
 **Alternative 2**
 
+```js
 var vector = new ol.layer.Vector({
   source: new ol.source.Vector({
     projection: 'EPSG:4326'
@@ -124,6 +125,7 @@ vector.getSource().addFeatures(parser, {
     }
   }]
 });
+```
 
 ### Load data based on map extent