Format all tests.

tests/language_strong/string_overflow.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.
 
 // Test to ensure that the VM does not have an integer overflow issue
 // when concatenating strings.
 
 import "package:expect/expect.dart";
 
-main()
-{
+main() {
   String a = "a";
-  for( ; a.length < 256 * 1024 * 1024 ; )
-    a = a + a;
+  for (; a.length < 256 * 1024 * 1024;) a = a + a;
 
   var exception_thrown = false;
   try {
     var concat = "$a$a$a$a$a$a$a$a";
   } on OutOfMemoryError catch (exc) {
     exception_thrown = true;
   }
   Expect.isTrue(exception_thrown);
 }
-