[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.

2 files changed, 14 insertions, 14 deletions

diff --git a/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala b/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala
index a783fe305f..868658dfe5 100644
--- a/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala
+++ b/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala
@@ -415,11 +415,11 @@ class GraphOps[VD: ClassTag, ED: ClassTag](graph: Graph[VD, ED]) extends Seriali
   }
 
   /**
-    * Compute the connected component membership of each vertex and return a graph with the vertex
-    * value containing the lowest vertex id in the connected component containing that vertex.
-    *
-    * @see [[org.apache.spark.graphx.lib.ConnectedComponents$#run]]
-    */
+   * Compute the connected component membership of each vertex and return a graph with the vertex
+   * value containing the lowest vertex id in the connected component containing that vertex.
+   *
+   * @see [[org.apache.spark.graphx.lib.ConnectedComponents$#run]]
+   */
   def connectedComponents(): Graph[VertexId, ED] = {
     ConnectedComponents.run(graph)
   }
diff --git a/graphx/src/main/scala/org/apache/spark/graphx/lib/ConnectedComponents.scala b/graphx/src/main/scala/org/apache/spark/graphx/lib/ConnectedComponents.scala
index 137c512c99..4e9b13162e 100644
--- a/graphx/src/main/scala/org/apache/spark/graphx/lib/ConnectedComponents.scala
+++ b/graphx/src/main/scala/org/apache/spark/graphx/lib/ConnectedComponents.scala
@@ -60,15 +60,15 @@ object ConnectedComponents {
   } // end of connectedComponents
 
   /**
-    * Compute the connected component membership of each vertex and return a graph with the vertex
-    * value containing the lowest vertex id in the connected component containing that vertex.
-    *
-    * @tparam VD the vertex attribute type (discarded in the computation)
-    * @tparam ED the edge attribute type (preserved in the computation)
-    * @param graph the graph for which to compute the connected components
-    * @return a graph with vertex attributes containing the smallest vertex in each
-    *         connected component
-    */
+   * Compute the connected component membership of each vertex and return a graph with the vertex
+   * value containing the lowest vertex id in the connected component containing that vertex.
+   *
+   * @tparam VD the vertex attribute type (discarded in the computation)
+   * @tparam ED the edge attribute type (preserved in the computation)
+   * @param graph the graph for which to compute the connected components
+   * @return a graph with vertex attributes containing the smallest vertex in each
+   *         connected component
+   */
   def run[VD: ClassTag, ED: ClassTag](graph: Graph[VD, ED]): Graph[VertexId, ED] = {
     run(graph, Int.MaxValue)
   }