Format all tests.

tests/language/named_argument_in_const_creation_test.dart

 // Copyright (c) 2012, 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 {
   final x;
   final y;
-  const A(a, {b}) : x = a, y = b;
+  const A(a, {b})
+      : x = a,
+        y = b;
   static const test = const A(1, b: 2);
 }
 
 main() {
   A a = A.test;
   Expect.equals(1, a.x);
   Expect.equals(2, a.y);
 }