[WordPress] Comment date to format %count_days% ago

functions.php

function pressfore_comment_time_output($date, $d, $comment){
  return sprintf( _x('%s ago', '%s = human-readable time difference'), human_time_diff(get_comment_time('U'), current_time('timestamp')));
}
add_filter('get_comment_date', 'pressfore_comment_time_output', 10, 3);