Returns HTML for a recent node to be displayed in the recent content block.
$variables: An associative array containing:
function theme_node_recent_content($variables) {
$node = $variables['node'];
$output = '<div class="node-title">';
$output .= l($node->title, 'node/' . $node->nid);
$output .= theme('mark', array(
'type' => node_mark($node->nid, $node->changed),
));
$output .= '</div><div class="node-author">';
$output .= theme('username', array(
'account' => user_load($node->uid),
));
$output .= '</div>';
return $output;
}