Genesis Framework: Customize Post Navigations

functions.php

//CUSTOM POST NAVIGATIONS
//* Customize the next page link
add_filter ( 'genesis_next_link_text' , 'sp_next_page_link' );
function sp_next_page_link ( $text ) {
    return '»';
}
//* Customize the previous page link
add_filter ( 'genesis_prev_link_text' , 'sp_previous_page_link' );
function sp_previous_page_link ( $text ) {
    return '«';
}