Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r84615167
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Covariance.scala
---
@@ -76,8 +76,14 @@ abstract class Covariance(x: Expression, y: Expression)
extends DeclarativeAggre
}
}
+
--- End diff --
This wouldn't be a nit because most of case class definitions across
expressions seem have double-spaced indentation. Also, it seems fine -
https://github.com/databricks/scala-style-guide#blank-lines-vertical-whitespace
> Use one or two blank line(s) to separate class definitions.
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