Revision of .zip and .zip-latest refs #2632

Author: JJ

doc/Type/Supply.pod6

@@ -803,17 +803,25 @@ be called as a class method.
 
 =head2 method zip
 
-    method zip(Supply @*supplies, :&with = &[,] --> Supply:D)
+Defined as:
+
+    method zip(**@s, :&with)
 
 Creates a supply that emits combined values as soon as there is a new value
-seen on B<all> of the supplies.  By default, L<Lists|/type/List> are
+seen on B<all> of the supplies.  By default, L<C<Lists>|/type/List> are
 created, but this can be changed by specifying your own combiner with the
 C<:with> parameter.  The resulting supply is done as soon as B<any> of the given
 supplies are done.  Can also be called as a class method.
 
+This can also be used as a class method; in case it's used as an object
+method the corresponding supply will be one of the supplies combined (with no
+special treatment).
+
 =head2 method zip-latest
 
-    method zip-latest(Supply @*supplies, :&with = &[,], :$initial --> Supply:D)
+Defined as:
+
+    method zip-latest(**@s, :&with, :$initial )
 
 Creates a supply that emits combined values as soon as there is a new value
 seen on B<any> of the supplies.  By default, L<Lists|/type/List> are