fix reference disappearing for distill blog in absence of author (#1804)

_layouts/distill.html

@@ -66,8 +66,9 @@
         <h1>{{ page.title }}</h1>
         <p>{{ page.description }}</p>
       </d-title>
-
+      {%- if page.authors -%}
       <d-byline></d-byline>
+      {%- endif -%}
 
       <d-article>
         {% if page.toc -%}

assets/js/distillpub/template.v2.js

@@ -1113,7 +1113,7 @@ ${math}
     if (!byline) {
       if (data.authors) {
         byline = dom.createElement('d-byline');
-        body.insertBefore(byline, article);
+        // body.insertBefore(byline, article);
       } else {
         console.warn('No authors found in front matter; please add them before submission!');
       }