Another victim of List.WHICH removal.

Happily, restoring the behavior in the original advent article.

integration/advent2013-day07.t

@@ -10,15 +10,6 @@ only sub infix:<<"\x2286">>($a, $b --> Bool) {
 is set( <a b c> ) ⊆ set( <a b c d> ), True,  'a b c   ⊆ a b c d';
 is set( <a b c d> ) ⊆ set( <a b c> ), False, 'a b c d ⊆ a b c';
 is <a b c> ⊆ <a b d>, False,                 'a b c   ⊆ a b d';
-
-# in the advent article, it returned False.  Since then, S07:55
-#
-#   "A C<List> is immutable, although the elements of a C<List>
-#    may be either mutable or immutable."
-#
-# is interpreted in such a way that Lists have become value based,
-# and that means that this test should return True
-is <a b c> === <a b c>, True, 'a b c === a b c';
-
+is <a b c> === <a b c>, False, 'a b c === a b c';
 is <a b c> eqv <a b c>, True, 'a b c eqv a b c';
 is set(<a b c>).WHICH, 'Set|Str|a Str|b Str|c', 'is .WHICH what we expect';