Format all tests.

tests/language_strong/switch6_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.
 // The break is in the right scope, http://b/3428700 was agreed upon.
 
 import "package:expect/expect.dart";
 
 class Switch6Test {
-
   static testMain() {
     var a = 0;
     var x = -1;
     switch (a) {
-      case 0: {
-        x = 0;
-        break;
-      }
+      case 0:
+        {
+          x = 0;
+          break;
+        }
       case 1:
         x = 1;
         break;
     }
     Expect.equals(0, x);
   }
-
 }
 
 main() {
   Switch6Test.testMain();
 }