fix: check for src before attempting to add popover

Jacky Zhao

2022-04-06 f9c7cdf928e8068532d2630336a7b08d5085548e

 layouts/_default/_markup/render-link.html

@@ -11,6 +11,6 @@
<a
  {{if not $nonexistent}}href="{{$rooted}}"{{end}}
  rel="noopener" class="internal-link{{if $nonexistent}} broken{{end}}"
  data-src="{{$rooted}}">{{ .Text | safeHTML }}
  data-src="{{$rooted}}">{{- .Text | safeHTML -}}
</a>
{{- end -}}