ktlint format

Author: AndreiKingsley

core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/groupBy.kt

@@ -215,7 +215,6 @@ internal interface GroupByDocs {
      */
     interface AggregationStatistics
 
-
     /**
      * ### [GroupBy] transformations
      *

core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/pivot.kt

@@ -271,14 +271,12 @@ internal interface PivotDocs {
      */
     @ExcludeFromSources
     interface InwardKDocsForGrouped
-
 }
 
 /** {@set [SelectingColumns.OPERATION] [pivot][pivot]} */
 @ExcludeFromSources
 private interface SetPivotOperationArg
 
-
 /**
  * A specialized [ColumnsSelectionDsl] that allows specifying [pivot] key ordering
  * using the [then] function.
@@ -381,7 +379,6 @@ private interface PivotDslDocs
 @ExcludeFromSources
 private interface CommonPivotDocs
 
-
 // region pivot
 
 /**
@@ -837,7 +834,6 @@ public fun <G> GroupBy<*, G>.pivotCounts(vararg columns: KProperty<*>, inward: B
 
 // region pivot
 
-
 /**
  * Pivots the selected [\columns] within each group for further
  * [pivot aggregations][PivotGroupByDocs.Aggregation].