Mention "dd" in the Data::Dumper section

doc/Language/5to6-nutshell.pod6

@@ -1646,6 +1646,20 @@ Pair, with a key of the var name, and a value of the var value.
     ["foo" => 42, "bar" => 44, "baz" => [16, 32, 64, "Hike!"]]
 =end code
 
+There is also a debugging aid for developers called C<dd> (Tiny Data Dumper,
+so Tiny it lost the "t").  This will print the C<.perl> representation plus
+some extra information that could be introspected, of the given variables on
+STDERR:
+
+=begin code :preamble<no strict;>
+# Perl 6
+    dd $foo, $bar, @baz;
+# Output
+    Int $foo = 42
+    Int $bar = 44
+    Array @baz = [16, 32, 64, "Hike!"]
+=end code
+
 =head3 C<Getopt::Long>
 
 Switch parsing is now done by the parameter list of the C<MAIN> subroutine.