Fix the .toggle() case
Fix the .toggle() case

- if no checkers specified, $!done would not be properly initialized

lucasbuchala/rakudo,MasterDuke17/rakudo,softmoth/rakudo,tony-o/rakudo,rakudo/rakudo,labster/rakudo,salortiz/rakudo,nbrown/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,labster/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,Gnouc/rakudo,labster/rakudo,salortiz/rakudo,tony-o/rakudo,tbrowder/rakudo,rakudo/rakudo,salortiz/rakudo,softmoth/rakudo,awwaiid/rakudo,Gnouc/rakudo,lucasbuchala/rakudo,tony-o/rakudo,Gnouc/rakudo,tbrowder/rakudo,Gnouc/rakudo,tony-o/rakudo,salortiz/rakudo,softmoth/rakudo,nbrown/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,labster/rakudo,awwaiid/rakudo,Gnouc/rakudo,softmoth/rakudo,awwaiid/rakudo,rakudo/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,nbrown/rakudo,softmoth/rakudo,labster/rakudo,MasterDuke17/rakudo,nbrown/rakudo,awwaiid/rakudo,tony-o/rakudo,rakudo/rakudo,tony-o/rakudo,lucasbuchala/rakudo,rakudo/rakudo,rakudo/rakudo,tbrowder/rakudo,salortiz/rakudo,nbrown/rakudo,labster/rakudo,nbrown/rakudo,tbrowder/rakudo,salortiz/rakudo