adds text_with_links helper and use that in any comment.body in views, adds test to check for malicious injections in comment body

app/views/moderation/comments/index.html.erb

@@ -23,7 +23,7 @@
         <%= comment.commentable_type.constantize.model_name.human %>
         <span class="date"><%= l comment.updated_at.to_date %></span>
       </td>
-      <td><%= comment.body %></td>
+      <td><%= text_with_links comment.body %></td>
       <td class="text-center"><%= comment.flags_count %></td>
       <td>
         <%= link_to t("moderation.comments.index.hide"), hide_in_moderation_screen_moderation_comment_path(comment, request.query_parameters), method: :put, class: "delete" %>