Re-land "Format all multitests"

tests/language/mixin_supertype_subclass2_test.dart

Index: tests/language/mixin_supertype_subclass2_test.dart
diff --git a/tests/language/mixin_supertype_subclass2_test.dart b/tests/language/mixin_supertype_subclass2_test.dart
index d1b7f9149eed510b72ef0e1c3743f959c26054c4..71d1c38624fea41b1a2303d2f5049a8e112be9d0 100644
--- a/tests/language/mixin_supertype_subclass2_test.dart
+++ b/tests/language/mixin_supertype_subclass2_test.dart
@@ -12,18 +12,24 @@
 //     superclass of A is not a subtype of S_static."
 
 class B {}
+
 class C {}
+
 class D {}
+
 class E extends B with C implements D {}
+
 class F extends E {}
+
 class A extends E with M {}
+
 class M
   extends B //# 01: ok
   extends C //# 02: static type warning
   extends D //# 03: ok
   extends E //# 04: ok
   extends F //# 05: static type warning
-  {}
+{}
 
 main() {
   new A();