审核不通过站内信通知优化

@@ -1039,7 +1039,7 @@ public class GrassArticleServiceImpl implements IGrassArticleService {
             }
         }
         String noteContent = (StringUtils.isBlank(text)||text.length()<15)?text: (StringUtil.substring(text,0,15)+"...");
-        noteContent = StringUtils.isEmpty(noteContent)?"":noteContent;
+        noteContent = StringUtils.isEmpty(noteContent) ?  " ": noteContent;
         long publishTime = Long.valueOf(grassArticleReq.getPublishTime());
         String timeStr = DateUtil.long2DateStr(publishTime , "yyyyMMddHHmm");
         timeStr = timeStr.substring(0,4)+"年"+timeStr.substring(4,6)+"月"+timeStr.substring(6,8)+"日"+