Blog Pro Readmore button

function new_excerpt_more($more) {
return '';
}
add_filter('excerpt_more', 'new_excerpt_more', 21 );

function the_excerpt_more_link( $excerpt ){

 $post = get_post();
 $excerpt .= '<p class="read-more">';
 $excerpt .= '<a class="ast-button" href="'. get_permalink($post->ID) . '" target="_self">Read More »</a>';
 $excerpt .= '</p>';

 return $excerpt;
}
add_filter( 'the_excerpt', 'the_excerpt_more_link', 21 );