using same docs for all apis

Signed-off-by: DylanGuedes <[email protected]>

python/pyspark/sql/functions.py

@@ -2397,8 +2397,8 @@ def array_repeat(col, count):
 @since(2.4)
 def zip(*cols):
     """
-    Collection function: Merge two columns into one, such that the M-th element of the N-th
-    argument will be the N-th field of the M-th output element.
+    Collection function: Returns a merged array containing in the N-th position the
+    N-th value of each array given.
 
     :param cols: columns in input
 

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala

@@ -129,8 +129,10 @@ case class MapKeys(child: Expression)
 }
 
 @ExpressionDescription(
-  usage = """_FUNC_(a1, a2, ...) - Returns a merged array containing in the N-th position the
-  N-th value of each array given.""",
+  usage = """
+    _FUNC_(a1, a2, ...) - Returns a merged array containing in the N-th position the
+    N-th value of each array given.
+  """,
   examples = """
     Examples:
       > SELECT _FUNC_(array(1, 2, 3), array(2, 3, 4));
@@ -151,7 +153,7 @@ case class Zip(children: Seq[Expression]) extends Expression with ExpectsInputTy
 
   private lazy val arrayElementTypes = arrayTypes.map(_.elementType)
 
-  def mountSchema: StructType = {
+  private lazy val mountSchema: StructType = {
     val fields = children.zip(arrayElementTypes).zipWithIndex.map {
       case ((expr: NamedExpression, elementType), _) =>
         StructField(expr.name, elementType, nullable = true)

sql/core/src/main/scala/org/apache/spark/sql/functions.scala

@@ -3509,8 +3509,8 @@ object functions {
   def map_entries(e: Column): Column = withExpr { MapEntries(e.expr) }
 
   /**
-   * Merge multiple columns into a resulting one.
-   *
+   * Returns a merged array containing in the N-th position the N-th value
+   * of each array given.
    * @group collection_funcs
    * @since 2.4.0
    */