diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index 36748766f377a..0e2965e714dd7 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -41,7 +41,7 @@ import org.apache.spark.util.{AkkaUtils, Utils}
  * objects needs to have the right SparkEnv set. You can get the current environment with
  * SparkEnv.get (e.g. after creating a SparkContext) and set it with SparkEnv.set.
  */
-private[spark] class SparkEnv private[spark] (
+private[spark] class SparkEnv (
     val executorId: String,
     val actorSystem: ActorSystem,
     val serializer: Serializer,
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
index ca8ca650528b7..f7ac1bddd3b8f 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
@@ -38,8 +38,8 @@ import org.apache.spark.util._
 private[spark] sealed trait Values
 
 private[spark] case class ByteBufferValues(buffer: ByteBuffer) extends Values
-private[spark]case class IteratorValues(iterator: Iterator[Any]) extends Values
-private[spark]case class ArrayBufferValues(buffer: ArrayBuffer[Any]) extends Values
+private[spark] case class IteratorValues(iterator: Iterator[Any]) extends Values
+private[spark] case class ArrayBufferValues(buffer: ArrayBuffer[Any]) extends Values
 
 private[spark] class BlockManager(
     executorId: String,
diff --git a/core/src/main/scala/org/apache/spark/util/random/RandomSampler.scala b/core/src/main/scala/org/apache/spark/util/random/RandomSampler.scala
index dfa6013c58083..1fb2f60a8cd9d 100644
--- a/core/src/main/scala/org/apache/spark/util/random/RandomSampler.scala
+++ b/core/src/main/scala/org/apache/spark/util/random/RandomSampler.scala
@@ -70,7 +70,7 @@ class BernoulliSampler[T](lb: Double, ub: Double, complement: Boolean = false)
   override def clone = new BernoulliSampler[T](lb, ub)
 }
 
-/**               Ps
+/**
  * <span class="badge badge-red" style="float: right;">DEVELOPER API - UNSTABLE</span>
  *
  * A sampler based on values drawn from Poisson distribution.