Use gather again in limited-join (oops)
Use gather again in limited-join (oops)

I tried to refactor it in 17ec364078322 but half way through realized
that it's not going to make it better. Still, I somehow committed the
half-refactored version. It should be back to normal now.

MasterDuke17/whateverable,perl6/whateverable,perl6/whateverable,perl6/whateverable