Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/1397#issuecomment-159259389
There are still some scalastyle violations
```
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/optimization/GradientDescent.scala
message=File line length exceeds 100 characters line=56
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/optimization/GradientDescent.scala
message=File line length exceeds 100 characters line=221
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/optimization/GradientDescent.scala
message=File line length exceeds 100 characters line=224
```
You can check that locally by simply running `mvn clean verify`.
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