Update README.md

Author: plusdude

README.md

@@ -21,9 +21,10 @@ console.log(
 ```
 
 ## Usage
-Just include `array.generics.min.js` in your document
 
- <script src="path_to/array.generics.min.js"></script>
+```html
+<script src="path_to/array.generics.min.js"></script>
+```
 
 ## Methods