code review feedback 1.to -> 1 to and folds -> numFolds

mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala

@@ -185,10 +185,10 @@ object MLUtils {
    * Return a k element list of pairs of RDDs with the first element of each pair
    * containing a unique 1/Kth of the data and the second element contain the compliment of that.
    */
-  def kFold[T : ClassTag](rdd: RDD[T], folds: Int, seed: Int): List[Pair[RDD[T], RDD[T]]] = {
-    val foldsF = folds.toFloat
-    1.to(folds).map  { fold =>
-      val sampler = new BernoulliSampler[T]((fold-1)/foldsF,fold/foldsF, complement = false)
+  def kFold[T : ClassTag](rdd: RDD[T], numFolds: Int, seed: Int): List[Pair[RDD[T], RDD[T]]] = {
+    val numFoldsF = numFolds.toFloat
+    (1 to numFolds).map  { fold =>
+      val sampler = new BernoulliSampler[T]((fold-1)/numFoldsF,fold/numFoldsF, complement = false)
       val train = new PartitionwiseSampledRDD(rdd, sampler, seed)
       val test = new PartitionwiseSampledRDD(rdd, sampler.cloneComplement(), seed)
       (train, test)