my %keys = (A => "b");
            -    ---
            1     2     List has two items

##</code><code>##

my %keys = A => "b";
------------    ---
     1           2      List still there without parens

##</code><code>##

foreach ($x) { }     @a = @b;     f $x;
         ^^          ^^   ^^        ^^
        list        list  list     list
        value      value  value    value

$i, $j;     @a = ($i, $j);
^^^^^^      ^^   ^^^^^^^^
 list      list  list value
literal   value  (from list literal)