search-engine-optimization/_includes/header.html

<header class="site__header" role="banner" itemscope itemtype="//schema.org/WPHeader">

  <a href="//github.com/marcobiedermann/search-engine-optimization" class="github" target="_blank">
    <svg xmlns="//www.w3.org/2000/svg" viewBox="0 0 250 250" fill="#fff">
      <path d="M0 0l115 115h15l12 27 108 108V0z" fill="#70B7FD"/>
      <path class="github__arm" d="M128 109c-15-9-9-19-9-19 3-7 2-11 2-11-1-7 3-2 3-2 4 5 2 11 2 11-3 10 5 15 9 16" style=""/>
      <path class="github__body" d="M115 115s4 2 5 0l14-14c3-2 6-3 8-3-8-11-15-24 2-41 5-5 10-7 16-7 1-2 3-7 12-11 0 0 5 3 7 16 4 2 8 5 12 9s7 8 9 12c14 3 17 7 17 7-4 8-9 11-11 11 0 6-2 11-7 16-16 16-30 10-41 2 0 3-1 7-5 11l-12 11c-1 1 1 5 1 5z"/>
    </svg>
  </a>

</header>