Elaborate a bit in array/hash interpolation

Author: lizmat

doc/Language/5to6-perlop.pod6

@@ -285,13 +285,15 @@ get this behavior with single quotes.
 
 C<qq> allows interpolation of variables. However, by default, only
 scalar variables are interpolated. To get other variables to
-interpolate, you need to put square brackets after them. E. g. C<< @a =
-<1 2 3>;say qq/@a[] example@example.com/; >> results in "1 2 3
-example@example.com". Hashes interpolate in a possibly unexpected
-manner: C<< %a = 1 => 2, 3 => 4;say "%a[]"; >> results in a space
+interpolate, you need to put square brackets after them (the so-called
+L<zen-slice|/language/subscripts#index-entry-Zen_slices>) to get them to
+interpolate. E.g. C<< @a = <1 2 3>; say qq/@a[] example@example.com/; >>
+results in "1 2 3 example@example.com". Hashes interpolate in the same
+manner: C<< %a = 1 => 2, 3 => 4;say "%a{}"; >> results in a space
 separating the pairs and tabs separating the key from the value in each
-pair (apparently). You can also interpolate Perl 6 code in strings using
-curly braces. For all the details, see
+pair (because that's the standard stringification of C<Pair>s, and a hash
+acts as list of C<Pair>s when stringified). You can also interpolate Perl 6
+code in strings using curly braces. For all the details, see
 L<Interpolation|/language/quoting#Interpolation%3A_qq>.
 
 C<qw> works as in Perl 5, and can also be rendered as C<< <...> >>. E.