Format all tests.

tests/language/mixin_extends_is_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.
 
 import "package:expect/expect.dart";
 
-class S { }
-class M1 { }
-class M2 { }
+class S {}
 
-class C extends S with M1 { }
-class D extends S with M1, M2 { }
-class E extends S with M2, M1 { }
-class F extends E { }
+class M1 {}
 
-class C_ extends S with M1 { }
-class D_ extends S with M1, M2 { }
-class E_ extends S with M2, M1 { }
-class F_ extends E_ { }
+class M2 {}
+
+class C extends S with M1 {}
+
+class D extends S with M1, M2 {}
+
+class E extends S with M2, M1 {}
+
+class F extends E {}
+
+class C_ extends S with M1 {}
+
+class D_ extends S with M1, M2 {}
+
+class E_ extends S with M2, M1 {}
+
+class F_ extends E_ {}
 
 main() {
   var c = new C();
   Expect.isTrue(c is C);
   Expect.isFalse(c is D);
   Expect.isFalse(c is E);
   Expect.isFalse(c is F);
   Expect.isTrue(c is S);
   Expect.isTrue(c is M1);
   Expect.isFalse(c is M2);
@@ skipping 40 matching lines @@
   Expect.isFalse(e is C_);
   Expect.isFalse(e is D_);
   Expect.isFalse(e is E_);
   Expect.isFalse(e is F_);
 
   Expect.isFalse(f is C_);
   Expect.isFalse(f is D_);
   Expect.isFalse(f is E_);
   Expect.isFalse(f is F_);
 }