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];

diff --git a/packages/flutter_tools/test/compile_test.dart b/packages/flutter_tools/test/compile_test.dart
index 5bef8cc..b149a2a 100644
--- a/packages/flutter_tools/test/compile_test.dart
+++ b/packages/flutter_tools/test/compile_test.dart

@@ -334,8 +334,7 @@
     });
   });
 
-  group('compile expression', ()
-  {
+  group('compile expression', () {
     ProcessManager mockProcessManager;
     ResidentCompiler generator;
     MockProcess mockFrontendServer;

diff --git a/packages/flutter_tools/test/crash_reporting_test.dart b/packages/flutter_tools/test/crash_reporting_test.dart
index 3d49ff2..926ce87 100644
--- a/packages/flutter_tools/test/crash_reporting_test.dart
+++ b/packages/flutter_tools/test/crash_reporting_test.dart

@@ -210,32 +210,32 @@
   set encoding(_) => throw UnsupportedError('');
 
   @override
-  void add(_) {}
+  void add(_) { }
 
   @override
-  void write(_) {}
+  void write(_) { }
 
   @override
-  void writeAll(_, [ __ = '' ]) {}
+  void writeAll(_, [ __ = '' ]) { }
 
   @override
-  void writeln([ _ = '' ]) {}
+  void writeln([ _ = '' ]) { }
 
   @override
-  void writeCharCode(_) {}
+  void writeCharCode(_) { }
 
   @override
-  void addError(_, [ __ ]) {}
+  void addError(_, [ __ ]) { }
 
   @override
-  Future<dynamic> addStream(_) async {}
+  Future<dynamic> addStream(_) async { }
 
   @override
-  Future<dynamic> flush() async {}
+  Future<dynamic> flush() async { }
 
   @override
-  Future<dynamic> close() async {}
+  Future<dynamic> close() async { }
 
   @override
-  Future<dynamic> get done async {}
+  Future<dynamic> get done async { }
 }

diff --git a/packages/flutter_tools/test/src/mocks.dart b/packages/flutter_tools/test/src/mocks.dart
index b440e3f..52c5fc9 100644
--- a/packages/flutter_tools/test/src/mocks.dart
+++ b/packages/flutter_tools/test/src/mocks.dart

@@ -470,16 +470,16 @@
 
 class MockResidentCompiler extends BasicMock implements ResidentCompiler {
   @override
-  void accept() {}
+  void accept() { }
 
   @override
   Future<CompilerOutput> reject() async { return null; }
 
   @override
-  void reset() {}
+  void reset() { }
 
   @override
-  Future<dynamic> shutdown() async {}
+  Future<dynamic> shutdown() async { }
 
   @override
   Future<CompilerOutput> compileExpression(

diff --git a/packages/flutter_tools/test/web/devices_test.dart b/packages/flutter_tools/test/web/devices_test.dart
index 562e9bf..5a843f5 100644
--- a/packages/flutter_tools/test/web/devices_test.dart
+++ b/packages/flutter_tools/test/web/devices_test.dart

@@ -26,7 +26,7 @@
         minify: anyNamed('minify'),
         enabledAssertions: anyNamed('enabledAssertions'),
       )).thenAnswer((Invocation invocation) async => 0);
-      when(mockChromeLauncher.launch(any)).thenAnswer((Invocation invocation) async {});
+      when(mockChromeLauncher.launch(any)).thenAnswer((Invocation invocation) async { });
     });
 
     testUsingContext('can build and connect to chrome', () async {