Minor style fixes

core/src/main/scala/spark/SparkContext.scala

@@ -579,7 +579,7 @@ class SparkContext(
 
   /**
    *  Return pools for fair scheduler
-   *  TODO(xiajunluan):now, we have not taken nested pools into account
+   *  TODO(xiajunluan): We should take nested pools into account
    */
   def getPools: ArrayBuffer[Schedulable] = {
     taskScheduler.rootPool.schedulableQueue

core/src/main/scala/spark/ui/jobs/JobProgressUI.scala

@@ -41,7 +41,6 @@ private[spark] class JobProgressUI(val sc: SparkContext) {
   def listener = _listener.get
   val dateFmt = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
 
-
   private val indexPage = new IndexPage(this)
   private val stagePage = new StagePage(this)
   private val poolPage = new PoolPage(this)