Fix test expecting a Range rather than a Seq
Fix test expecting a Range rather than a Seq

List.keys had a short-cut whereby it would return a Range, rather
than a Seq (which one should expect).  This has been remedied with
d53a90594ce8010d0c and thus the test failed.

bitrauser/roast,dogbert17/roast,perl6/roast,bitrauser/roast,dogbert17/roast