Update all tests

tests/language/argument_definition_test.dart

 // Copyright (c) 2012, 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.
 // Dart test program for testing that the argument definition test has been
 // removed.
 
 import "package:expect/expect.dart";
 
 int test(a, {b, c}) {
-  if (?b) return b;  /// 01: compile-time error
+  if (?b) return b;  //# 01: compile-time error
   return a + b + c;
 }
 
 main() {
   Expect.equals(6, test(1, b: 2, c:3));
 }