incorrect selector to xpath translation

[bkdotcom]

'.classa > .classb'

should be: 'descendant-or-self::*[contains(concat(" ",@class," ")," classa ")]/*[contains(concat(" ",@class," ")," classb ")]'
edit: corrected on 2015-08-26

changing
$selector = str_replace(']/*', ']', $selector);
to
$selector = str_replace(']/*[position', '][position', $selector);
fixes the issue and passes regression testing

[bkdotcom]

my bad, should be
'descendant-or-self::*[contains(concat(" ",@class," ")," classa ")]/*[contains(concat(" ",@class," ")," classb ")]'