add ckeditor to reply field

app/views/admin/asks/_form.html.erb

@@ -161,7 +161,7 @@
         <div class="control-group">
           <%= f.label :reply, class: "control-label muted" %>
           <div class="controls">
-            <%= f.text_area :reply, rows: 10, style: 'max-width: 500px; width: 100%;' %>
+            <%= f.text_area :reply, rows: 10, style: 'max-width: 500px; width: 100%;', class: 'ckeditor' %>
           </div>
         </div>
         <div class="control-group">