Changed "welcome guest" in index.php now site won't load

Ok, I was editing my index.php from ...

define('TEXT_GREETING_GUEST', 'Welcome <span class="greetUser">Guest!</span> Would you like to <a href="%s">log yourself in</a>?');

to ...

define('TEXT_GREETING_GUEST', 'Welcome to South Western Ontario's Newest Martial Arts Supply Service <span class="greetUser">Guest!</span> <a href="%s">log in</a>');

now my site won't load ... it's only a blank page. I tried re-using my backup copy, but still nothing. what did I do wrong?

When you use special characters in define values, you need to 'escape' them by placing a backslash in front of the character. Try changing Ontario's to Ontario's.

nope, still nothing showing.

changed template to another one and then back and now everything is ok ... thanks.