Format all tests.

tests/language_strong/final_field_override_test.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.
 
 import "package:expect/expect.dart";
 
 class A {
   int _x = 42;
   void set x(int val) {
     _x = val;
   }
+
   int get x => _x;
 }
 
 class B extends A {
   final x = 3;
   // we can still get to the super property
   int get y => _x;
 }
 
 void main() {
   var b = new B();
   Expect.equals(3, b.x);
 
   b.x = 21;
   Expect.equals(3, b.x);
   Expect.equals(21, b.y);
 }