pan><span class="string">"start_tag"</span><span class="special">);</span>
        <span class="identifier">end_tag</span><span class="special">.</span><span class="identifier">name</span><span class="special">(</span><span class="string">"end_tag"</span><span class="special">);</span>

        <span class="identifier">on_error</span><span class="special">&lt;</span><span class="identifier">fail</span><span class="special">&gt;</span>
        <span class="special">(</span>
            <span class="identifie