Review feedback.

Author: ScrapCodes

project/project/SparkPluginBuild.scala

@@ -18,6 +18,11 @@
 import sbt._
 import sbt.Keys._
 
+/**
+ * This plugin project is there to define new scala style rules for spark. This is
+ * a plugin project so that this gets compiled first and is put on the classpath and
+ * becomes available for scalastyle sbt plugin.
+ */
 object SparkPluginDef extends Build {
   lazy val root = Project("plugins", file(".")) dependsOn(sparkStyle)
   lazy val sparkStyle = Project("spark-style", file("spark-style"), settings = styleSettings)

project/spark-style/src/main/scala/org/apache/spark/scalastyle/SparkSpaceAfterCommentStyleCheck.scala

@@ -19,14 +19,10 @@
 package org.apache.spark.scalastyle
 
 import java.util.regex.Pattern
-import org.scalastyle.PositionError
-import org.scalastyle.ScalariformChecker
-import org.scalastyle.ScalastyleError
-import scalariform.lexer.MultiLineComment
-import scalariform.lexer.ScalaDocComment
-import scalariform.lexer.SingleLineComment
+
+import org.scalastyle.{PositionError, ScalariformChecker, ScalastyleError}
+import scalariform.lexer.{MultiLineComment, ScalaDocComment, SingleLineComment, Token}
 import scalariform.parser.CompilationUnit
-import scalariform.lexer.Token
 
 class SparkSpaceAfterCommentStartChecker extends ScalariformChecker {
   val errorKey: String = "insert.a.single.space.after.comment.start"