[dexen]

Can we please give up this ``is-valid-XML'' argument already?

Quick counter-example:

  <?php echo 'foo ?>' ?>

Guess what:

- if interpreted as XML, the processing instruction ends at the first ?>

- if interpreted as PHP, the PHP code ends at the sencond ?>

...which makes the argument against short tags -- XML validity -- moot. Can't be fixed without breaking backward compatibility either. Let's drop the argument now; otherwise somebody well-meaning will try to apply it and will end up breaking backward-compatibility (and removing a neat feature) yet keeping XML-compatibility broken anyway. Just like Robert Eisele did.