utf and self closing tag test

timotimo++
ab5tract++

ab5tract discovered a problem parsing the p6 advent calender. timotimo notes:
    
    12:05 < timotimo> you don't ~~ against a m/../
    12:05 < timotimo> because m/.../ is a match against $_



See failing results for closing tag test here: https://travis-ci.org/ugexe/perl6-html-parser-xml/jobs/41109248#L1004