Format all tests.

tests/language_strong/is_operator_clash_test.dart

 // Copyright (c) 2015, 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 {
-}
+class A {}
 
-class $B extends A {
-}
+class $B extends A {}
 
 class C implements $B {
   // Try to clash with dart2js's isCLASS field.
   var isB = false;
   var $isB = false;
   var is$B = false;
   var is$$B = false;
   var $is$B = false;
 
   var isA = false;
@@ skipping 16 matching lines @@
   var b = things[inscrutable(1)];
   Expect.isTrue(b is A);
   Expect.isTrue(b is $B);
   Expect.isFalse(b is C);
 
   var c = things[inscrutable(2)];
   Expect.isTrue(c is A);
   Expect.isTrue(c is $B);
   Expect.isTrue(c is C);
 }