minor formatting

Author: manishamde

mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala

@@ -77,12 +77,12 @@ class DecisionTree (private val strategy: Strategy) extends Serializable with Lo
     // Max memory usage for aggregates
     val maxMemoryUsage = strategy.maxMemoryInMB * 1024 * 1024
     logDebug("max memory usage for aggregates = " + maxMemoryUsage + " bytes.")
-    val numElementsPerNode = {
+    val numElementsPerNode =
       strategy.algo match {
         case Classification => 2 * numBins * numFeatures
         case Regression => 3 * numBins * numFeatures
       }
-    }
+
     logDebug("numElementsPerNode = " + numElementsPerNode)
     val arraySizePerNode = 8 * numElementsPerNode // approx. memory usage for bin aggregate array
     val maxNumberOfNodesPerGroup = math.max(maxMemoryUsage / arraySizePerNode, 1)