Format all tests.

tests/kernel/unsorted/return_test.dart

 // Copyright (c) 2016, 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.
 
 // Tests of return (and imports, literals, ==, and static methods).
 
 import 'package:expect/expect.dart';
 
 test0() {}
 
-test1() { return; }
+test1() {
+  return;
+}
 
-test3() { return 3; }
+test3() {
+  return 3;
+}
 
 test4() => 4;
 
 test5() {
   return 5;
   Expect.isTrue(false);
 }
 
 main() {
   Expect.isTrue(test0() == null);
   Expect.isTrue(test1() == null);
   Expect.isTrue(test3() == 3);
   Expect.isTrue(test4() == 4);
   Expect.isTrue(test5() == 5);
 }