Adds indexing for Zen slices; minor revs closes #2044

Author: JJ

doc/Language/subscripts.pod6

@@ -304,15 +304,16 @@ This behavior exists as a precaution to prevent runaway generation of massive,
 potentially infinite C<Lists> and the out-of-memory issues that occur as a
 result.
 
+X<|Zen slices>
 =head2 Zen slices
 
-If you write a subscript without specifying any indices/keys at all, it simply
+If you put the subscript operator behind an object without specifying any indices/keys at all, it simply
 returns the subscripted object itself. Since it is empty but returns
-everything, it is known as a "Zen slice".
+everything, it is known as a I<Zen slice>.
 
-It is different both from passing a Whatever-star (which, like a normal slice,
+Zen slicing is different from passing a Whatever-star (which, like a normal slice,
 always returns a List of elements no matter the type of the original object)
-and from passing an empty list (which returns an empty slice):
+or an empty list (which returns an empty slice):
 
     my %bag := (orange => 1, apple => 3).Bag;
     say %bag<>;    # OUTPUT: «Bag(apple(3), orange)␤»