Format all tests.

tests/language/vm/closure_memory_retention_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.
 // VMOptions=--old_gen_heap_size=50
 
 // Test that non-capturing closures don't retain unnecessary memory.
 // It tests that the context of `f` allocated within `bar` not leaking and does
 // not become the context of empty non-capturing closure allocated inside `foo`.
 // If failing it crashes with an OOM error.
 
 import "package:expect/expect.dart";
 
 foo() {
-  return () { };
+  return () {};
 }
 
 bar(a, b) {
   f() => [a, b];
   return foo();
 }
 
 main() {
   var closure = null;
   for (var i = 0; i < 100; i++) {
     closure = bar(closure, new List(1024 * 1024));
   }
   Expect.isTrue(closure is Function);
 }