$link['diffhead'] = $controller->href_compound('diff.php', null, Paths::fetch_rev_str(true, 'HEAD', $controller->revnum));
}
$show['prev'] = ($prev = $controller->cachev->fetch_prev_revision($controller->revnum));
if ($show['prev'])
{
$link['diffhead'] = $controller->href_compound('diff.php', null, Paths::fetch_rev_str(true, 'HEAD', $controller->revnum));
}
$show['prev'] = ($prev = $controller->cachev->fetch_prev_revision($controller->revnum));
if ($show['prev'])
{