small improvements to the switch statement

[shoulders]

I would like to see the following small improvements to the switch statement in block.t.php:

• add the case 'no'. i got the options from the switch statement rather than reading the notes at the top so it is not obvious about using the no case
• add // This is the default case (set above) to the 'html' case so it is easier to know that this is the default one because usually you have a 'default' case in these statements

    switch ($escape) {
    case 'html':
        // This is the default case (set above)
        $text = nl2br(htmlspecialchars($text));
        break;
    case 'javascript':
    case 'js':
        // javascript escape
        $text = strtr($text, array('\\' => '\\\\', "'" => "\\'", '"' => '\\"', "\r" => '\\r', "\n" => '\\n', '</' => '<\/'));
        break;
    case 'url':
        // url escape
        $text = urlencode($text);
        break;
    case 'no':
        // no escaping
        break;
    }

[glensc]

You are welcome to send PR with the change.

[shoulders]

will do

note for me i might add a the default case in:

case: no
default: