Fix statement modifier on LEAVE thinko
Fix statement modifier on LEAVE thinko

🎶 What was I thinking? 🎶

At first it looked like a misplaced `}` but the rest of the line is
unreasonably overcomplicated, so I was just being dumb at that moment.

Rakudobug: https://github.com/rakudo/rakudo/issues/2243

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