fixes #1913

app/views/comments/index_by_post.html.erb

@@ -1,6 +1,11 @@
 <div id="c-comments">
   <div id="a-index">
     <h1>Comments</h1>
+    <% if !CurrentUser.user.is_builder? %>
+      <div style="margin-bottom: 1em;">
+        <h2>Before commenting, read the <%= link_to "how to comment guide", wiki_pages_path(:search => {:title => "howto:comment"}) %>.</h2>
+      </div>
+    <% end %>
 
     <% if @posts.empty? %>
       <%= render "post_sets/blank" %>

app/views/posts/show.html.erb

@@ -59,6 +59,9 @@
       </menu>
 
       <section id="comments">
+        <% if !CurrentUser.user.is_builder? %>
+          <h2>Before commenting, read the <%= link_to "how to comment guide", wiki_pages_path(:search => {:title => "howto:comment"}) %>.</h2>
+        <% end %>
         <%= render "comments/partials/index/list", :comments => @post.comments.visible(CurrentUser.user), :post => @post, :show_header => false %>
       </section>