fixup! Add support for Graphviz dot diagrams

This avoids unwanted empty lines when there are no Graphviz diagrams on
the page.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

layouts/_default/baseof.html

@@ -197,7 +197,7 @@ <h1 data-pagefind-meta="title">About{{ if (isset .Params "subtitle") }} - {{ .Pa
     mermaid.initialize({ startOnLoad: true });
   </script>
 {{ end -}}
-{{- if .Page.Store.Get "hasGraphviz" }}
+{{- if .Page.Store.Get "hasGraphviz" -}}
 <script src="{{ relURL "js/viz-global.js" }}"> </script>
 <script type="text/javascript">
   (() => {
@@ -211,6 +211,6 @@ <h1 data-pagefind-meta="title">About{{ if (isset .Params "subtitle") }} - {{ .Pa
     });
   })();
 </script>
-{{ end }}
+{{ end -}}
 </html>
 {{ end }}