Fix missing p tag without violating the purity of plaintext

www/hendelser/index.php

@@ -35,7 +35,7 @@ foreach($agenda->getNextDays() as $period => $events) {
 
 			<?php $description = $event->getDescription(); ?>
 			<?php if ($description_paragraphs) array_splice($description, $description_paragraphs); ?>
-			<?= implode($description, "</p>\n<p>") ?>
+			<p><?= implode($description, "</p>\n<p>") ?></p>
 
 			<ul class="subtext">
 				<li>Tid: <strong><?= Agenda::getFormattedDate($event->getStart()) ?></strong>