Format all tests.

tests/lib/mirrors/optional_parameters_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.
 
 // Regression test for http://dartbug.com/22987.
 // Ensure that functions whose signature only differs in optionality of
 // parameters are reflected correctly.
 
 library optional_parameter_test;
 
 @MirrorsUsed(targets: 'optional_parameter_test')
 import "dart:mirrors";
 import 'package:expect/expect.dart';
 
 class A {
   foo(int x) => x;
 }
 
 class B {
-  foo([int x]) => x+1;
+  foo([int x]) => x + 1;
 }
 
-main () {
+main() {
   var x = {};
   x["A"] = reflect(new A());
   x["B"] = reflect(new B());
 
   Expect.equals(1, x["A"].invoke(#foo, [1]).reflectee);
   Expect.equals(2, x["B"].invoke(#foo, [1]).reflectee);
 }