jrnl/docs_theme/main.html

{% extends "base.html" %}

{% block search_button %}
<form class="mkdocs-search" action="{{ base_url }}/search.html">
  <input type="text" name="q" placeholder="Search docs" title="Type search term here">
  <button class="icon icon-search" aria-label="submit"></button>
</form>
{% endblock %}