[rakudo]: * Clean up List '.pairs' method to return Perl6Pairs instead of the   outdated Pair PMC.
[rakudo]:
* Clean up List '.pairs' method to return Perl6Pairs instead of the
  outdated Pair PMC.


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@27913 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot