quentin.dufour.io/_includes/navigation.html

<nav class="main-nav">
    {% if page.url != "/index.html" and  page.url != "/"%}
        <a href='/'> <span class="arrow">←</span> Blog </a>
    {% endif %}
  
    {% if page.url != "/about/" %}
        {% if site.aboutPage %}
            <a href='/about/'>À propos </a>
        {% endif %}
    {% endif %}
    <a class="cta" href="/feed.xml">Flux RSS</a>
</nav>