format initializer list of constructors (#27111)

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;