Update based on Yong-Siang Shih's errate report

Author: holdenk

src/test/scala/com/high-performance-spark-examples/goldilocks/EvaluationTests.scala

@@ -77,20 +77,20 @@ class EvaluationTests extends FunSuite with SharedSparkContext {
 
     // tag::TwoActions[]
     val sorted = rddA.sortByKey()
-    val count = sorted.count()
+    val count = sorted.count() // sorted Action 1
     val sample: Long = count / 10
-    sorted.take(sample.toInt)
+    val sampled = sorted.take(sample.toInt) // sorted Action 2
     // end::TwoActions[]
   }
 
   test( "Two actions with caching  "){
     val rddA: RDD[(Double, Int)] = sc.parallelize(keyValuePairs)
     // tag::TwoActionsCache[]
     val sorted = rddA.sortByKey()
-    val count = sorted.count()
+    sorted.persist()
+    val count = sorted.count() // sorted Action 1
     val sample: Long = count / 10
-    rddA.persist()
-    sorted.take(sample.toInt)
+    val sampled = sorted.take(sample.toInt) // sorted Action 2
     // end::TwoActionsCache[]
   }