Streamline CUR.candidates a bit
Streamline CUR.candidates a bit

- don't repeatedly call methods inside a grep
- make it a single pipeline instead of bound Seqs, for clarity
- drop unnecessary use of .kv

labster/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,labster/rakudo,MasterDuke17/rakudo,salortiz/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,salortiz/rakudo,salortiz/rakudo,labster/rakudo,rakudo/rakudo,labster/rakudo,tbrowder/rakudo,salortiz/rakudo,tbrowder/rakudo,tbrowder/rakudo,rakudo/rakudo,labster/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,rakudo/rakudo,labster/rakudo,rakudo/rakudo,rakudo/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,salortiz/rakudo