Format all tests.

tests/language/generic_field_mixin3_test.dart

Index: tests/language/generic_field_mixin3_test.dart
diff --git a/tests/language/generic_field_mixin3_test.dart b/tests/language/generic_field_mixin3_test.dart
index 1af6d1e510d0e455f8ebf2e3ea8ae1b8fe32587d..d8e78f3217fdc21d834a547182ee8a39ba27ba59 100644
--- a/tests/language/generic_field_mixin3_test.dart
+++ b/tests/language/generic_field_mixin3_test.dart
@@ -9,7 +9,9 @@ import 'package:expect/expect.dart';
 class M<T> {
   var field = new A<int>() is A<T>;
 }
+
 class A<U> {}
+
 class C1<V> = Object with M<V>;
 class C2 = Object with M<int>;
 class C3 = Object with M<String>;
@@ -21,4 +23,4 @@ main() {
   Expect.isTrue(new C2().field);
 
   Expect.isFalse(new C3().field);
-}
+}