Format all tests.

tests/language_strong/mixin_type_parameters_super_extends_test.dart

Index: tests/language_strong/mixin_type_parameters_super_extends_test.dart
diff --git a/tests/language_strong/mixin_type_parameters_super_extends_test.dart b/tests/language_strong/mixin_type_parameters_super_extends_test.dart
index 0ad3fe6513a7e996d93db157f7952750e915f9d6..cdebe98257f8769be7babc25aac57e89effc8ec9 100644
--- a/tests/language_strong/mixin_type_parameters_super_extends_test.dart
+++ b/tests/language_strong/mixin_type_parameters_super_extends_test.dart
@@ -37,13 +37,15 @@ class S<T> {
   }
 }
 
-class M {
-}
+class M {}
+
+class C0<T> extends S with M {}
+
+class C1<T> extends S<T> with M {}
+
+class C2<T> extends S<int> with M {}
 
-class C0<T> extends S with M { }
-class C1<T> extends S<T> with M { }
-class C2<T> extends S<int> with M { }
-class C3 extends S<String> with M { }
+class C3 extends S<String> with M {}
 
 main() {
   var c0 = new C0();