修改admin中js与html中的问题

template/admin/announcement/announcement.html

@@ -56,7 +56,7 @@
         <div class="form-group">
             <label>标题</label>
             <input name="title" type="text" class="form-control" id="title" placeholder="公告标题"
-                   data-error="请填写公告标题" maxlength="50" required>
+                   data-error="请填写公告标题(标题不得超过50字)" maxlength="50" required>
             <div class="help-block with-errors"></div>
         </div>
         <div class="form-group">