hird argument.
   The third argument must be one of the strings
   <span class="quote">“<span class="quote"><code class="literal">()</code></span>”</span>,
   <span class="quote">“<span class="quote"><code class="literal">(]</code></span>”</span>,
   <span class="quote">“<span class="quote"><code class="literal">[)</code></span>”</span>, or
   <span class="quote">“<span class="quote"><code class="literal">[]</code></span>”</span>.
   For example:

</p><pre class="programlisting">
-- The full