<header>

    <a id="logo" href="/">
        {{ site.name }}{{ site.separator }}{{ site.title }}
    </a>

    <h2 id="description">{{ site.description }}</h2>

    <a id="github" href={{ site.github_url }} target="_blank">
        {% octicon mark-github height:56 %}
    </a>

</header>

<header>

    <a id="logo" title="Copyright © 2017. Design by yk." href="/">
        {{ site.name }}{{ site.separator }}{{ site.title }}
    </a>

    <h2 id="description">{{ site.description }}</h2>

    <a id="github" href={{ site.github_url }} target="_blank">
        {% octicon mark-github height:56 %}
    </a>

</header>

Add copyright message in logo's title
Add copyright message in logo's title
