_includes/header.html

<!-- Header -->
<div id="header">
    <div class="readable-content">
        <h1><a href="/">{{ site.title | replace: "®", "<sup>®</sup>" }}</a></h1>
        <ul id="navigation" class="menu">
            {% include nav-menu.html path="_links" %}
        </ul>
    </div>
</div>