I'm not sure if I'm doing it just wrong or if there is a bug in the unescape modifier

What I'm trying is something like this

{$content|unescape:'htmlall':'utf-8'}

This results in:

<?php echo html_entity_decode($content, ENT_NOQUOTES, ''utf-8'');?>

Looking into the code, I see that there is $params[ 2 ] = "'{$params[ 2 ]}'"; - but somehow it is already in quotes.

For params[1] it does a trim for " and ' - why not for params[2]?

On a side note, even if I not using it, but I tested it now while debugging this issue:

{$content|unescape:'htmlall':$encoding}

results in

<?php echo html_entity_decode($content, ENT_NOQUOTES, '$encoding');?>

so its not working $encoding is inside single quote.