[tutorial]: * Added another substr op usage example. * Patch courtesy Colin Kuskie <ckuskie@sterlink.net>
[tutorial]:
* Added another substr op usage example.
* Patch courtesy Colin Kuskie <ckuskie@sterlink.net>


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@20575 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot