nit

Author: ulysses-you

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala

@@ -159,7 +159,7 @@ trait CheckAnalysis extends PredicateHelper {
             failAnalysis("grouping_id() can only be used with GroupingSets/Cube/Rollup")
 
           case e: Expression if e.children.exists(_.isInstanceOf[WindowFunction]) &&
-            !e.isInstanceOf[WindowExpression] =>
+              !e.isInstanceOf[WindowExpression] =>
             val w = e.children.find(_.isInstanceOf[WindowFunction]).get
             failAnalysis(s"Window function $w requires an OVER clause.")
 

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala

@@ -885,7 +885,7 @@ class AnalysisSuite extends AnalysisTest with Matchers {
         "timestamp <> double at the second column of the second table"))
   }
 
-  test("throw user facing error when use WindowFunction directly") {
+  test("SPARK-31975: Throw user facing error when use WindowFunction directly") {
     assertAnalysisError(testRelation2.select(RowNumber()),
       Seq("Window function row_number() requires an OVER clause."))