Remove user email ids from Email Digest

Hi,
I would like to remove user email ids from the daily/weekly email digests (privacy issues). Right now, the emails have:

By {nickname} {email id}

It seems to be from this line of code in emails/digest/posts.php:
<?php echo JText::_('COM_EASYDISCUSS_DIGEST_BY'); ?> <?php echo ($post->user_id) ? $post->getOwner()->getName() : $post->poster_name; ?> (<?php echo ($post->user_id) ? $post->getOwner()->getEmail() : $post->poster_email; ?>

What is the best edit to get just the nickname?

Thanks!!