Apply ktLintFormat and korro

Author: Allex-Nik

docs/StardustDocs/topics/columnArithmetics.md

@@ -22,7 +22,7 @@ For example,
 <!---FUN columnArithmetics_groupBy_without_expr-->
 
 ```kotlin
-orders.groupBy { status + " orders"  }
+orders.groupBy { status + " orders" }
 ```
 
 <!---END-->

samples/src/test/kotlin/org/jetbrains/kotlinx/dataframe/samples/api/Modify.kt

@@ -311,7 +311,7 @@ class Modify : DataFrameSampleHelper("operations", "modify") {
         )
 
         // SampleStart
-        orders.groupBy { status + " orders"  }
+        orders.groupBy { status + " orders" }
         // SampleEnd
     }