Why the messages show "\n" ？

[jenvenson]

I used Syslog Kafka for conllecting message, but the messages show “\n” not LF(Line Feed) in graylog as shown below. i hope show message in graylog as log in server，how can i set it？
[graylog]

[log in server]

[jan (Jan Doberstein)]

you did not reveal how you have ingested the messages.

[jenvenson]

I set rsyslog to kafka, and the configration of grayllog-inputs and the template of rsyslog config file as shown below.

[jan (Jan Doberstein)]

Did I spot a \n at the end of the template?

[jenvenson]

I try many time, that is not the reason.
When I collect multiple lines of messages, the end of each line is automatically added “/n” in graylog.