format initializer list of constructors (#27111)

diff --git a/packages/flutter_tools/test/commands/doctor_test.dart b/packages/flutter_tools/test/commands/doctor_test.dart
index 95c9141..0a403cc 100644
--- a/packages/flutter_tools/test/commands/doctor_test.dart
+++ b/packages/flutter_tools/test/commands/doctor_test.dart
@@ -477,7 +477,7 @@
 }
 
 class MissingValidator extends DoctorValidator {
-  MissingValidator(): super('Missing Validator');
+  MissingValidator() : super('Missing Validator');
 
   @override
   Future<ValidationResult> validate() async {
@@ -490,7 +490,7 @@
 }
 
 class NotAvailableValidator extends DoctorValidator {
-  NotAvailableValidator(): super('Not Available Validator');
+  NotAvailableValidator() : super('Not Available Validator');
 
   @override
   Future<ValidationResult> validate() async {
@@ -622,7 +622,7 @@
 }
 
 class MissingGroupedValidator extends DoctorValidator {
-  MissingGroupedValidator(String name): super(name);
+  MissingGroupedValidator(String name) : super(name);
 
   @override
   Future<ValidationResult> validate() async {
@@ -633,7 +633,7 @@
 }
 
 class PartialGroupedValidator extends DoctorValidator {
-  PartialGroupedValidator(String name): super(name);
+  PartialGroupedValidator(String name) : super(name);
 
   @override
   Future<ValidationResult> validate() async {
@@ -702,7 +702,7 @@
 
 class VsCodeValidatorTestTargets extends VsCodeValidator {
   VsCodeValidatorTestTargets._(String installDirectory, String extensionDirectory, {String edition})
-      : super(VsCode.fromDirectory(installDirectory, extensionDirectory, edition: edition));
+    : super(VsCode.fromDirectory(installDirectory, extensionDirectory, edition: edition));
 
   static VsCodeValidatorTestTargets get installedWithExtension =>
       VsCodeValidatorTestTargets._(validInstall, validExtensions);
diff --git a/packages/flutter_tools/test/emulator_test.dart b/packages/flutter_tools/test/emulator_test.dart
index 7a7c5b4..71469fb 100644
--- a/packages/flutter_tools/test/emulator_test.dart
+++ b/packages/flutter_tools/test/emulator_test.dart
@@ -164,7 +164,7 @@
 
 class _MockEmulator extends Emulator {
   _MockEmulator(String id, this.name, this.manufacturer, this.label)
-      : super(id, true);
+    : super(id, true);
 
   @override
   final String name;
diff --git a/packages/flutter_tools/test/integration/test_driver.dart b/packages/flutter_tools/test/integration/test_driver.dart
index 0148296..b95e2c2 100644
--- a/packages/flutter_tools/test/integration/test_driver.dart
+++ b/packages/flutter_tools/test/integration/test_driver.dart
@@ -590,8 +590,8 @@
 }
 
 class FlutterTestTestDriver extends FlutterTestDriver {
-  FlutterTestTestDriver(Directory _projectFolder, {String logPrefix}):
-    super(_projectFolder, logPrefix: logPrefix);
+  FlutterTestTestDriver(Directory _projectFolder, {String logPrefix})
+    : super(_projectFolder, logPrefix: logPrefix);
 
   Future<void> test({
     String testFile = 'test/test.dart',
diff --git a/packages/flutter_tools/test/resident_runner_test.dart b/packages/flutter_tools/test/resident_runner_test.dart
index 815de93..2a20530 100644
--- a/packages/flutter_tools/test/resident_runner_test.dart
+++ b/packages/flutter_tools/test/resident_runner_test.dart
@@ -12,7 +12,7 @@
 
 class TestRunner extends ResidentRunner {
   TestRunner(List<FlutterDevice> devices)
-      : super(devices);
+    : super(devices);
 
   bool hasHelpBeenPrinted = false;
   String receivedCommand;