Format all tests.

tests/language/switch8_test.dart

 // Copyright (c) 2013, 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.
 
 // Regression test for dart2js that used to not generate code for
 // compile-time constants only seen in case expressions.
 
 class A {
   const A();
 }
 
 main() {
   switch (new List(1)[0]) {
-    case const A(): throw 'Test failed';
+    case const A():
+      throw 'Test failed';
   }
 }