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<?php
  /**
   * Change the output for submmited by in comments
   */
  function rrm_comment_submitted($comment) {
    return t('Posted by !username at @time', array(
      '!username' => theme('username', $comment),
      '@date' => format_date($comment->timestamp, 'custom', 'd M Y'),
      '@time' => format_date($comment->timestamp, 'custom', 'g:i a')
    ));
  }
?>