fix block formatting (#29051)

packages/flutter_tools/lib/src/device.dart

diff --git a/packages/flutter_tools/lib/src/device.dart b/packages/flutter_tools/lib/src/device.dart
index cad682f..f92fc2f 100644
--- a/packages/flutter_tools/lib/src/device.dart
+++ b/packages/flutter_tools/lib/src/device.dart
@@ -492,5 +492,5 @@
   List<ForwardedPort> get forwardedPorts => <ForwardedPort>[];
 
   @override
-  Future<void> unforward(ForwardedPort forwardedPort) async {}
+  Future<void> unforward(ForwardedPort forwardedPort) async { }
 }