runtimeterror/layouts/_default/_markup/render-link.html

{{- $u := urls.Parse .Destination -}}
<a href="{{ .Destination | safeURL }}"
  {{- with .Title }} title="{{ . }}"{{ end -}}
  {{- if $u.IsAbs }} rel="external"{{ end -}}
>
  {{- with .Text | safeHTML }}{{ . }}{{ end -}}
  {{- if $u.IsAbs }}↗{{ end -}}
</a>
{{- /* chomp trailing newline */ -}}