Changing the separator on wp_list_pages()

Hi all,

I would like to know how to change the separator that wp_list_pages() puts in between each page (the default is <li>). I’ve searched around, and several people have been wanting to do this. wp_list_cats() allows it, but for some reason wp_list_pages doesn’t.

The documentation says how to change the beginning and ends of the page listing (i.e., the text that says “Pages”). Does this involve going into the template-functions-post.php? I tried looking in there, but either the source is too complex, or the <li> tag is added somewhere else.

Thanks in advance