DashShen edited a comment on pull request #12911:
URL: https://github.com/apache/flink/pull/12911#issuecomment-659776124
@zentol There is trully a rule constrains file should be end with a new line.
```xml
<module name="Checker">
....
<module name="NewlineAtEndOfFile">
<!-- windows can use \r\n vs \n, so enforce the most used one ie UNIx
style -->
<property name="lineSeparator" value="lf" />
</module>
...
```
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