List element

Hello,

Where to find code responsible for puting list element from tools menu into body?
Now when I choose list element from toolbar and insert this element into body I have:

<ul>
<li>&nbsp;</li>
</ul>

I would like to change this to:

<ul>
<li>&raquo;&nbsp;</li>
</ul>

or

<ul>
<li><span>&raquo;</span></li>
</ul>

I want to use no grapics in this situation only &raquo;

Regards
tom