<?php $title = "Maintenance"; $slim_ui = true; require("./header.inc.phtml"); ?>
      <article>
        <header>Maintenance</header>
        <section>
          <p><?php echo htmlspecialchars($this->context->message, ENT_HTML5, "UTF-8"); ?></p>
        </section>
      </article>
<?php require("./footer.inc.phtml"); ?>

<?php $title = "Maintenance"; $slim_ui = true; require("./header.inc.phtml"); ?>
      <article>
        <header>Maintenance</header>
        <section>
          <p><?php echo nl2br(htmlspecialchars($this->context->message, ENT_HTML5, "UTF-8")); ?></p>
        </section>
      </article>
<?php require("./footer.inc.phtml"); ?>

Add breaks for new lines in maintenance message
Add breaks for new lines in maintenance message
