Check the correctness of attribute parsing.

>>>>templates/test.tpl
<foo>
<tag attribute1="foo" attribute2="bar" />
<tag attribute3='foo' attribute4='bar' />
</foo>

>>>>data.php
$this->tpl->prologRequired = false;

>>>>expected.txt
OUTPUT

>>>>result.txt
<foo>
<tag attribute1="foo" attribute2="bar" />
<tag attribute3="foo" attribute4="bar" />
</foo>