修复

app/views/admins/feedbacks/_list.html.erb

@@ -19,7 +19,7 @@
         <td><%= feedback.created_at&.strftime('%Y-%m-%d %H:%M') %></td>
         <td>
           <a href="#" data-toggle="tooltip" data-placement="bottom" title="<%= feedback.content%>">
-            <%= feedback.content.truncate(30) %>
+            <%= feedback.content.truncate(20) %>
           </a>
         </td>
         <td class="action-container">