Advanced Category Excluder breaks w3c validation

I’m using Advanced Category Excluder 1.4.3 on WordPress 2.9.2 here. When you modify the header to exclude google etc. you run this code (line 378 of advanced-category-excluder.php)…

<—–cut—–>
if($modifyheader)
{
echo ‘<meta name=”robots” content=”noindex, nofollow”>’.”\n”;
echo ‘<!– A.C.E. by DjZoNe –>’;
return true;
}
return false;
<—-/cut—–>

This breaks validation. When you open a page from a excluded category in https://validator.w3.org/ it says…

<—–cut—–>
# Error Line 1, Column 5384: end tag for “meta” omitted, but OMITTAG NO was specified

…=”robots” content=”noindex, nofollow”><meta name=”description” content=”Als ei…

You may have neglected to close an element, or perhaps you meant to “self-close” an element, that is, ending it with “/>” instead of “>”.
<—-/cut—–>

To solve this just add a / to the end of the meta tag before you close it

<—–cut—–>
if($modifyheader)
{
echo ‘<meta name=”robots” content=”noindex, nofollow” />’.”\n”;
echo ‘<!– A.C.E. by DjZoNe –>’;
return true;
}
return false;
<—-/cut—–>

…and the problem is solved.

https://www.ads-software.com/extend/plugins/advanced-category-excluder/