GitHub user wangyum opened a pull request:
https://github.com/apache/spark/pull/22570
[SPARK-25553][BUILD] Add EmptyInterpolatedStringChecker to scalastyle config
## 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 to
us. This PR add it to `scalastyle-config.xml` and fix all empty interpolated
string issue.
## How was this patch tested?
manual tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wangyum/spark SPARK-25553
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22570.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #22570
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commit 0a01aa311f038771706cb029cf89607390f0cd57
Author: Yuming Wang <yumwang@...>
Date: 2018-09-27T12:43:15Z
Add EmptyInterpolatedStringChecker to scalastyle-config.xml
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