Excessive HTML validation

Is anyone else looking at tweaks for HTML validation? Been trying to get green across the board in 'Tidy', .e.g. in 'library\environment\url.php':
[php]
    if ($action) {
//$link .= '&action=' . $action;
      $link .= '&action=' . $action;
    }
   
foreach ($query as $key => $value) {
if ($value) {
//$link .= '&' . $key . '=' . urlencode($value);
    $link .= '&' . $key . '=' . urlencode($value);
  }
}
[/php]
providing a summary attribute for tables, titles for links etc,.

I have tried somthing like this before and found that the redirects cause problems.

You can try user / instead of & and then altering the request class to read the /.