wangyum opened a new pull request #22570: [SPARK-25553][BUILD] Add EmptyInterpolatedStringChecker to scalastyle config URL: https://github.com/apache/spark/pull/22570 ## What changes were proposed in this pull request? [EmptyInterpolatedStringChecker](http://www.scalastyle.org/rules-dev.html#org_scalastyle_scalariform_EmptyInterpolatedStringChecker) used for check for empty string interpolations. This feature is very useful for us. This PR add it to `scalastyle-config.xml` and fix all empty interpolated string issue. ## How was this patch tested? manual tests
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