Update PL/Perl6 page to describe using pointy blocks

html/plperl6.html

@@ -48,6 +48,17 @@ <h1>Rakudo Perl 6</h1>
 <p>
 The first line is SQL, and everything between the $$ symbols is Perl 6! This stored procedure takes a single integer N and returns the sum of the first N Fibonacci numbers.
 </p>
+<p>
+You will notice that the above stored procedure uses <b>@_</b>, and you may ask : Doesn't Perl 6 have named function arguments? Why are we still using <b>@_</b> ?
+The answer is that, by default, you get access to <b>@_</b> inside a stored procedure, but if you want named function arguments, then you use a "pointy block", like so:
+<pre>
+CREATE OR REPLACE FUNCTION pointy_fibonacci(integer) RETURNS int LANGUAGE plperl6 AS $$
+-> $limit {
+    [+] (1, 1, *+* ... $limit)
+}(|@_);
+$$;
+</pre>
+The arrow begins the "pointy block", followed by the named parameters.
 
 </div>
 </div>