Correct formatting to make scalafmtTest pass in travis

Author: busti

src/main/scala/org/scalajs/dom/raw/lib.scala

@@ -2698,6 +2698,7 @@ class Window
  * MDN
  */
 trait EventListenerOptions extends js.Object {
+
   /**
    * A Boolean indicating that events of this type
    * will be dispatched to the registered listener