Adding a line in php

How do you add a line in the single.php file? I would like to add a line between my post and the author? How do you get code php to add a line?

<?php get_header(); ?>

<!– start sidebar one –>
<div id=”sidebar1″ class=”sidebar”>

<?php /* Widgetized sidebar, if you have the plugin installed. */
if ( function_exists(‘dynamic_sidebar’) && dynamic_sidebar(2)) : else : ?>
• <h2><?php _e(‘Recent Posts’); ?></h2>

<?php get_archives(‘postbypost’, ’10’, ‘custom’, ‘
• ‘, ‘

‘); ?>

<?php endif; ?>

</div>
<!– end sidebar one –>

<div id=”content” class=”widecolumn”>

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

<div class=”post” id=”post-<?php the_ID(); ?>”>
<h1 class=”title”>” rel=”bookmark” title=”Permanent Link: <?php the_title_attribute(); ?>”><?php

the_title(); ?></h1>

<div class=”entry”>
<?php the_content(‘<p class=”serif”>Read the rest of this entry »</p>’); ?>

<?php wp_link_pages(array(‘before’ => ‘<p>Pages: ‘, ‘after’ => ‘</p>’, ‘next_or_number’ => ‘number’)); ?>
<?php the_tags( ‘<p>Tags: ‘, ‘, ‘, ‘</p>’); ?></div></div>

<?php the_author(); ?>

<?php comments_template(); ?>

<?php endwhile; else: ?>

<p>Sorry, no posts matched your criteria.</p>

<?php endif; ?>

</div>

<?php get_sidebar(); ?>

<?php get_footer(); ?>