Format all tests.

tests/language/mixin_mixin2_test.dart

Index: tests/language/mixin_mixin2_test.dart
diff --git a/tests/language/mixin_mixin2_test.dart b/tests/language/mixin_mixin2_test.dart
index ddbb1b83e6bb37bb451088ac446166b4050dbdba..b9da5794c9beb804707f49fa15744837fb3f3d5a 100644
--- a/tests/language/mixin_mixin2_test.dart
+++ b/tests/language/mixin_mixin2_test.dart
@@ -5,7 +5,9 @@
 import "package:expect/expect.dart";
 
 class M<T> {
-  t() { return T; }
+  t() {
+    return T;
+  }
 }
 
 class A<U> = Object with M<U>;
@@ -16,13 +18,13 @@ class C<U> = Object with M<List<U>>;
 
 class D<V> = Object with C<Set<V>>;
 
-class E extends A<num> { }
+class E extends A<num> {}
 
-class F extends B<String> { }
+class F extends B<String> {}
 
-class G<T> extends C<T> { }
+class G<T> extends C<T> {}
 
-class H<T> extends D<Map<String, T>> { }
+class H<T> extends D<Map<String, T>> {}
 
 main() {
   Expect.equals("num", new E().t().toString());