Run formatter on a few frontend and kernel files that hadn't been formatted.

pkg/front_end/testcases/cycles.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-class A implements C {
-}
+class A implements C {}
 
-class B extends A {
-}
+class B extends A {}
 
-class C extends B implements D {
-}
+class C extends B implements D {}
 
-class D {
-}
+class D {}
 
 main() {
   print(new A());
   print(new B());
   print(new C());
   print(new D());
 }