Update all tests

tests/corelib_strong/throw_half_surrogate_pair_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.
 
 main() {
   var trebleClef = "\u{1D11E}";
   if (trebleClef.length != 2) throw "String should be a surrogate pair";
   // These uncaught exceptions should not caush the VM to crash attempting to
   // print a malformed string.
-  throw trebleClef[0];  /// 01: runtime error
-  throw trebleClef[1];  /// 02: runtime error
+  throw trebleClef[0];  //# 01: runtime error
+  throw trebleClef[1];  //# 02: runtime error
 }