Make Complex.Str 5%-10% faster
Make Complex.Str 5%-10% faster

By not stringifying imaginary Num twice

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