Style updates based on Andrew's review

Author: kayousterhout

core/src/main/resources/org/apache/spark/ui/static/table.js

@@ -17,7 +17,7 @@
 
 /* Adds background colors to stripe table rows. This is necessary (instead of using css or the
  * table striping provided by bootstrap) to appropriately stripe tables with hidden rows. */
-function stripeTables(){
+function stripeTables() {
     $("table.table-striped-custom").each(function() {
         $(this).find("tr:not(:hidden)").each(function (index) {
            if (index % 2 == 1) {

core/src/main/scala/org/apache/spark/ui/UIUtils.scala

@@ -272,7 +272,7 @@ private[spark] object UIUtils extends Logging {
     }
 
     val headerRow: Seq[Node] = {
-      headers.view.zipWithIndex.map{ x =>
+      headers.view.zipWithIndex.map { x =>
         <th width={colWidthAttr} class={getClass(x._2)}>{getHeaderContent(x._1)}</th>
       }
     }

core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala

@@ -139,7 +139,7 @@ private[ui] class StagePage(parent: JobProgressTab) extends WebUIPage("stage") {
       val accumulableTable = UIUtils.listingTable(accumulableHeaders, accumulableRow,
         accumulables.values.toSeq)
 
-      val taskHeadersAndClasses: Seq[(String, String)] =
+      val taskHeadersAndCssClasses: Seq[(String, String)] =
         Seq(
           ("Index", ""), ("ID", ""), ("Attempt", ""), ("Status", ""), ("Locality Level", ""),
           ("Executor ID / Host", ""), ("Launch Time", ""), ("Duration", ""), ("Accumulators", ""),
@@ -154,11 +154,11 @@ private[ui] class StagePage(parent: JobProgressTab) extends WebUIPage("stage") {
           else Nil} ++
         Seq(("Errors", ""))
 
-      val unzipped = taskHeadersAndClasses.unzip
+      val unzipped = taskHeadersAndCssClasses.unzip
 
       val taskTable = UIUtils.listingTable(
         unzipped._1, taskRow(hasInput, hasShuffleRead, hasShuffleWrite, hasBytesSpilled), tasks,
-        headerClasses=unzipped._2)
+        headerClasses = unzipped._2)
       // Excludes tasks which failed and have incomplete metrics
       val validTasks = tasks.filter(t => t.taskInfo.status == "SUCCESS" && t.taskMetrics.isDefined)