[MINOR][DOCS] Use multi-line JavaDoc comments in Scala code.

## What changes were proposed in this pull request?

This PR aims to fix all Scala-Style multiline comments into Java-Style multiline comments in Scala codes.
(All comment-only changes over 77 files: +786 lines, −747 lines)

## How was this patch tested?

Manual.

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #12130 from dongjoon-hyun/use_multiine_javadoc_comments.

1 files changed, 7 insertions, 7 deletions

diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizerExtendableSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizerExtendableSuite.scala
index 7e3da6bea7..6e5672ddc3 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizerExtendableSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizerExtendableSuite.scala
@@ -23,21 +23,21 @@ import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.catalyst.rules.Rule
 
 /**
-  * This is a test for SPARK-7727 if the Optimizer is kept being extendable
-  */
+ * This is a test for SPARK-7727 if the Optimizer is kept being extendable
+ */
 class OptimizerExtendableSuite extends SparkFunSuite {
 
   /**
-    * Dummy rule for test batches
-    */
+   * Dummy rule for test batches
+   */
   object DummyRule extends Rule[LogicalPlan] {
     def apply(p: LogicalPlan): LogicalPlan = p
   }
 
   /**
-    * This class represents a dummy extended optimizer that takes the batches of the
-    * Optimizer and adds custom ones.
-    */
+   * This class represents a dummy extended optimizer that takes the batches of the
+   * Optimizer and adds custom ones.
+   */
   class ExtendedOptimizer extends Optimizer {
 
     // rules set to DummyRule, would not be executed anyways