Constant CHANGELOG_HTML 

pub const CHANGELOG_HTML: &str = "{% extends \"base.html\" %}\n\n{% block title %}Changelog - {{ site_title }}{% endblock %}\n\n{% block content %}\n<h1>Changelog</h1>\n<p class=\"page-description\">Completed specs grouped by date</p>\n\n{% for group in changelog_groups %}\n<section class=\"changelog-group\">\n    <h2>{{ group.date }}</h2>\n    <ul class=\"changelog-list\">\n        {% for spec in group.specs %}\n        <li>\n            <a href=\"{{ base_url }}specs/{{ spec.id }}.html\">{{ spec.id }}</a>\n            <span class=\"changelog-title\">{{ spec.title | default(value=\"Untitled\") }}</span>\n            {% for label in spec.labels %}\n            <span class=\"label-badge small\">{{ label }}</span>\n            {% endfor %}\n        </li>\n        {% endfor %}\n    </ul>\n</section>\n{% endfor %}\n\n{% if changelog_groups | length == 0 %}\n<p class=\"empty-state\">No completed specs to display</p>\n{% endif %}\n{% endblock %}\n";