fix block formatting (#29051)

diff --git a/packages/flutter_tools/test/application_package_test.dart b/packages/flutter_tools/test/application_package_test.dart
index ff660ad..7e17356 100644
--- a/packages/flutter_tools/test/application_package_test.dart
+++ b/packages/flutter_tools/test/application_package_test.dart
@@ -225,7 +225,7 @@
     }, overrides: overrides);
     testUsingContext('Bad ipa zip-file, no payload dir', () {
       fs.file('app.ipa').createSync();
-      when(os.unzip(fs.file('app.ipa'), any)).thenAnswer((Invocation _) {});
+      when(os.unzip(fs.file('app.ipa'), any)).thenAnswer((Invocation _) { });
       final PrebuiltIOSApp iosApp = IOSApp.fromPrebuiltApp(fs.file('app.ipa'));
       expect(iosApp, isNull);
       final BufferLogger logger = context[Logger];