Windows is not cooperating

Splitting a string on java.io.File.separator on Windows (i.e. "\") fails
with a PatternSyntaxException.

core/src/main/scala/org/apache/spark/util/Utils.scala

@@ -1101,7 +1101,7 @@ private[spark] object Utils extends Logging {
    * Strip the directory from a path name
    */
   def stripDirectory(path: String): String = {
-    path.split(File.separator).last
+    new File(path).getName
   }
 
   /**