Fixes pairs refs #1731

Author: JJ

doc/Type/Any.pod6

@@ -951,20 +951,21 @@ If it's a class, it will simply return Nil.
 
 Defined as:
 
-    multi method pairs(Any:U:  -->List)
-    multi method pairs(Any:D:  -->List)
+    multi method pairs(Any:U:)
+    multi method pairs(Any:D:)
 
-Converts the invocant to a L<List|/type/List> via the C<list> method and returns
-the result of L<List.pairs|/type/List#routine_pairs> on it. Returns an empty
-L<List|/type/List> if the invocant is undefined:
+Returns an empty
+L<List|/type/List> if the invocant is a type object:
 
+    say Num.pairs; # OUTPUT: «()␤»
 
-    say Any.pairs; # OUTPUT: «()␤»
-    my $a;
-    say $a.pairs;  # OUTPUT: «()»
-    $a = Any.new;
-    say $a.pairs;  # OUTPUT: «(0 => Any.new)»
+For a value object, it converts the invocant to a L<List|/type/List> via the
+C<list> method and returns the result of L<List.pairs|/type/List#routine_pairs>
+on it.
+
+    <1 2 2 3 3 3>.Bag.pairs.say;# OUTPUT: «(1 => 1 3 => 3 2 => 2)␤»
 
+In this case, every element (with weight) in a bag is converted to a pair.
 
 =head2 method antipairs