Quote Post Formate content filter

// Quote Post Formate content filter

function rx_quote_post_format($content){
  $post_format = get_post_format();
  if( $post_format == 'quote' ){
    $output = '<div class="rx_quote_post">';
    $output .= $content;
    $output .= '</div>';
    return $output;
  }
  return $content;
}
add_filter( 'the_excerpt','rx_quote_post_format' );