Format all tests.

tests/language/inheritance_chain_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";
 import "inheritance_chain_lib.dart";
 
 class A extends B {
   get id => "A";
   get length => 1;
 }
 
-class C extends  D {
+class C extends D {
   get id => "C";
   get length => 3;
 }
 
 class X extends W {
   get id => "X";
   get length => -3;
 }
 
 class Z extends Y {
@@ skipping 69 matching lines @@
   Expect.isTrue(o is W);
   o = instances[7];
   Expect.equals("Z", o.id);
   Expect.equals(-1, o.length);
   Expect.isTrue(o is Z);
   Expect.isTrue(o is Y);
   Expect.isTrue(o is X);
   Expect.isTrue(o is W);
   o = instances[8];
   Expect.equals(0, o.length);
-}
+}