Format all tests.

tests/language/regress_21016_test.dart

 // Copyright (c) 2014, 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.
 
 // Test that we give up on tracing a function if one of its closurizations
 // escapes tracing.
 
 class A {
   var _boo = 22;
   get boo {
     return _boo;
     return 1;
   }
 }
 
 class B {
   var _bar = 42;
   get boo {
     return _bar;
     return 1;
   }
 }
 
 class Holder {
   tearMe(x) => x.boo;
 }
 
 var list = [];
 
-main () {
+main() {
   var holder = new Holder();
   var hide = ((X) => X)(holder.tearMe);
   hide(new A());
   list.add(holder.tearMe);
   var x = list[0];
   x(new B());
 }