new line

https://insight.sensiolabs.com/projects/cf3d97c6-e026-4489-8493-a3f4a1e75a68/analyses/23?status=violations#186050846

.formatter.yml

@@ -16,4 +16,4 @@ header: |
      * Feel free to edit as you please, and have fun.
      *
      * @author Marc Morera <yuhu@mmoreram.com>
-     */
+     */