[perl #117681] .WHAT.perl on objects with a curried rule doesn't show type

[Christian Bartolomaeus via RT]

This works now as expected:

$ perl6 -e 'role Cup[::Contents] { }; class EggNog { }; my Cup of EggNog $mug; 
$mug.WHAT.perl.say'
Cup[EggNog]

Since the test in integration/advent2009-day18.t is unfudged and runs fine in 
spectests, I'm closing this ticket.