Format all tests.

tests/language/const_global_test.dart

 // Copyright (c) 2011, 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";
 
 const a = 1;
 
 main() {
-    Expect.equals(1, a);
-    Expect.equals(1, const A(a).a);
-    Expect.equals(1, const [const A(a)][0].a);
+  Expect.equals(1, a);
+  Expect.equals(1, const A(a).a);
+  Expect.equals(1, const [const A(a)][0].a);
 }
 
 class A {
-    final a;
-    const A(this.a);
+  final a;
+  const A(this.a);
 }