[jQuery] Do tabulations and spaces make a difference?

[Cristian]

Hi!
I just downloaded jquery today and the first thing I did was to start
learning from this tutorial: 
http://docs.jquery.com/Tutorials:Getting_Started_with_jQuery
, but I am having trouble with this part:
http://docs.jquery.com/Tutorials:Getting_Started_with_jQuery#Find_me:_Using_selectors_and_events

In that part, there is this code:

 $(document).ready(function() {
   $("#orderedlist li:last").hover(function() {
     $(this).addClass("green");
   },function(){
     $(this).removeClass("green");
   });
 });

That works just fine, but when I try to type it myself so it looks
like this:

        $(document).ready(function() {
                $("#orderedlist li:last").hover(function() {
                        $(this).addClass("green");
                },function() {
                        $(this).removeClass("green");
                });
        }):

It doesn't work. I have checked it thoroughly for misspelled words,
but I don't see any difference between them. Can you spot the problem?
I won't see examples all the time, so copy & paste only works in
tutorials. I have to learn the syntax right.
Are the spaces in there causing the problem?

Thank you for your help.