修改发热推送不出结果

common-push/src/main/java/org/diagbot/common/push/filter/rule/PretreatmentRule.java

@@ -96,7 +96,7 @@ public class PretreatmentRule {
                             accord_rule_map.put(ruleType, accord_rules);
                             searchData.setRules(accord_rule_map);
 
-                            content = content + rule.getRemind() == null ? "" : rule.getRemind();
+                            content = content + (rule.getRemind() == null ? "" : rule.getRemind());
                         }
                     }
                 }