fix style

Author: WeichenXu123

mllib/src/main/scala/org/apache/spark/ml/stat/Summarizer.scala

@@ -592,4 +592,4 @@ object SummaryBuilderImpl extends Logging {
 
   private[this] val udt = new VectorUDT
 
-}
+}

mllib/src/test/scala/org/apache/spark/ml/stat/SummarizerSuite.scala

@@ -579,4 +579,4 @@ class SummarizerSuite extends SparkFunSuite with MLlibTestSparkContext {
       print("RDD from DataFrame : ", timeRDDFromDF)
     }
   }
-}
+}