Update to Drupal 8.0.0 beta 14. For more information, see https://drupal.org/node/2544542

core/modules/comment/templates/comment.html.twig

@@ -67,32 +67,22 @@
  */
 #}
 
-<article{{ attributes }}>
-  {% if title %}
-    {{ title_prefix }}
-  {% endif %}
-
+<article{{ attributes.addClass('js-comment') }}>
   {#
-  Hide the "new" indicator by default, let a piece of JavaScript ask
-  the server which comments are new for the user. Rendering the final
-  "new" indicator here would break the render cache.
+    Hide the "new" indicator by default, let a piece of JavaScript ask the
+    server which comments are new for the user. Rendering the final "new"
+    indicator here would break the render cache.
   #}
   <mark class="hidden" data-comment-timestamp="{{ new_indicator_timestamp }}"></mark>
 
-  {% if title %}
-    <h3{{ title_attributes }}>{{ title }}</h3>
-    {{ title_suffix }}
-  {% endif %}
-
-
   <footer>
     {{ user_picture }}
     <p>{{ submitted }}</p>
 
     {#
-      Indicate the semantic relationship between parent and child comments
-      for accessibility. The list is difficult to navigate in a screen
-      reader without this information.
+      Indicate the semantic relationship between parent and child comments for
+      accessibility. The list is difficult to navigate in a screen reader
+      without this information.
     #}
     {% if parent %}
       <p class="visually-hidden">{{ parent }}</p>
@@ -102,9 +92,11 @@
   </footer>
 
   <div{{ content_attributes }}>
-    {{ content|without('links') }}
+    {% if title %}
+      {{ title_prefix }}
+      <h3{{ title_attributes }}>{{ title }}</h3>
+      {{ title_suffix }}
+    {% endif %}
+    {{ content }}
   </div>
-  {% if content.links %}
-    {{ content.links }}
-  {% endif %}
 </article>