diff --git a/doc/examples/with_widgets_overlay/lib/example_game.dart b/doc/examples/with_widgets_overlay/lib/example_game.dart
index 7f3f007d5..93f785585 100644
--- a/doc/examples/with_widgets_overlay/lib/example_game.dart
+++ b/doc/examples/with_widgets_overlay/lib/example_game.dart
@@ -36,4 +36,3 @@ class ExampleGame extends Game with HasWidgetsOverlay, TapDetector {
     }
   }
 }
-
diff --git a/lib/game/widget_builder.dart b/lib/game/widget_builder.dart
index b54d1b354..45d5fcd0a 100644
--- a/lib/game/widget_builder.dart
+++ b/lib/game/widget_builder.dart
@@ -158,7 +158,7 @@ class OverlayGameWidget extends StatefulWidget {
   final Widget gameChild;
   final HasWidgetsOverlay game;
 
-  OverlayGameWidget({Key key, this.gameChild, this.game}): super(key: key);
+  OverlayGameWidget({Key key, this.gameChild, this.game}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _OverlayGameWidgetState();
@@ -197,6 +197,7 @@ class OverlayWidgetBuilder extends WidgetBuilder {
   Widget build(Game game) {
     final container = super.build(game);
 
-    return OverlayGameWidget(gameChild: container, game: game, key: UniqueKey());
+    return OverlayGameWidget(
+        gameChild: container, game: game, key: UniqueKey());
   }
 }