FIX remove some whitespaces or empty lines + add btn in absence message homepage (still commented out)

src/Bundle/ChillMainBundle/Controller/AbsenceController.php

@@ -64,6 +64,6 @@ class AbsenceController extends AbstractController
         $em->flush();
 
         return $this->redirect($this->generateUrl('chill_main_user_absence_index'));
-        
+
     }
 }