fix code style

Author: yanboliang

mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala

@@ -286,8 +286,8 @@ private[python] class PythonMLLibAPI extends Serializable {
    * Java stub for Python mllib IsotonicRegression.run()
    */
   def trainIsotonicRegressionModel(
-                                    data: JavaRDD[Vector],
-                                    isotonic: Boolean): JList[Object] = {
+      data: JavaRDD[Vector],
+      isotonic: Boolean): JList[Object] = {
     val isotonicRegressionAlg = new IsotonicRegression().setIsotonic(isotonic)
     try {
       val model = isotonicRegressionAlg.run(data.rdd.map(_.toArray).map {

mllib/src/main/scala/org/apache/spark/mllib/regression/IsotonicRegression.scala

@@ -60,8 +60,8 @@ class IsotonicRegressionModel (
 
   /** A Java-friendly constructor that takes two Iterable parameters and one Boolean parameter. */
   def this(boundaries: java.lang.Iterable[Double],
-           predictions: java.lang.Iterable[Double],
-           isotonic: java.lang.Boolean) = {
+      predictions: java.lang.Iterable[Double],
+      isotonic: java.lang.Boolean) = {
     this(boundaries.asScala.toArray, predictions.asScala.toArray, isotonic)
   }