Simplify sub index candidates
Simplify sub index candidates

Named parameters can be optional and still expected.  This is
different from methods, where unexpected nameds are just ignored.

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