Mailu/docs/_templates/layout.html

{% extends "!layout.html" %}
{% block document %}
{% if version != stable_version %}
<div class="wy-alert info">
    <p>You are currently browsing documentation for the <b>{{ version }}</b> branch. Documentation for the stable <b>{{ stable_version }}</b> branch can be found <a href="/{{ stable_version }}/">here</a>.</p>
</div>
{% endif %}
{{ super() }}
{% endblock %}