Site documentation page breaks theme

There seems to be one "/div" tag too much in site documentation page generation:

line 167:   $output = '<div class="site-documentation">'. l(t('Change settings.'), 'admin/settings/sitedoc') .'<br/><br/>';
...
(many sections in between)
...
line 382:   $output .= "</div>\n";
...
(another section, "Get info from Filter and Filter_format tables")
...
line 397:   $output .= "</div>\n";
line 398:  return $output;

This breaks the theme at my site (right sidebar content is displayed at the bottom of the page generated, on the left side...), so I've commented out the line 382 and everything seems to be OK now (right sidebar is back, displayed as on all other pages).