hugo-theme-anubis2/layouts/_default/_markup/render-heading.html

<h{{ .Level }} id="{{ .Anchor | safeURL }}" {{ if .Attributes.style }}style="{{ .Attributes.style | safeCSS }}"{{ end }}>
<div>
    <a href="#{{ .Anchor }}">
        {{ range seq 2 .Level}}#{{end}}
    </a>
    {{ .Text | safeHTML }}
</div>
</h{{ .Level }}>