消息通知，多台机具切换通道时，通知详情中，SN需换行展示

AppStart/PosChannelHelper.cs

@@ -90,7 +90,7 @@ public class PosChannelHelper
                     {
                         UserId = edit.UserId, //创客
                         Title = "机具通道变更通知", //标题
-                        Content = "<div class='f16' style='padding:12px 16px;'>尊敬的" + user.RealName + "盟主您好:<br/><br/><div class='f14' style='text-indent:2em;'>您名下的机具" + PosSnList.TrimEnd(',') + "，通道已更改为" + ChannelName + "，请知悉!</ div> </ div>", //内容
+                        Content = "<div class='f16' style='padding:12px 16px;'>尊敬的" + user.RealName + "盟主您好:<br/><br/><div class='f14' style='text-indent:2em;'>您名下的机具" + PosSnList.TrimEnd(',').Replace(",", "<br />") + "，通道已更改为" + ChannelName + "，请知悉!</ div> </ div>", //内容
                         CreateDate = DateTime.Now,
                     }));
                 }