Add back test for distinct without parens

core/src/test/scala/spark/RDDSuite.scala

@@ -12,7 +12,8 @@ class RDDSuite extends FunSuite with LocalSparkContext {
     val nums = sc.makeRDD(Array(1, 2, 3, 4), 2)
     assert(nums.collect().toList === List(1, 2, 3, 4))
     val dups = sc.makeRDD(Array(1, 1, 2, 2, 3, 3, 4, 4), 2)
-    assert(dups.distinct().count === 4)
+    assert(dups.distinct().count() === 4)
+    assert(dups.distinct.count === 4)  // Can distinct and count be called without parentheses?
     assert(dups.distinct().collect === dups.distinct().collect)
     assert(dups.distinct(2).collect === dups.distinct().collect)
     assert(nums.reduce(_ + _) === 10)