Code format.

core/src/main/scala/spark/Accumulators.scala

core/src/main/scala/spark/Aggregator.scala

core/src/main/scala/spark/BoundedMemoryCache.scala

core/src/main/scala/spark/Cache.scala

core/src/main/scala/spark/CacheTracker.scala

core/src/main/scala/spark/CartesianRDD.scala

core/src/main/scala/spark/ClosureCleaner.scala

core/src/main/scala/spark/CoGroupedRDD.scala

core/src/main/scala/spark/DAGScheduler.scala

core/src/main/scala/spark/Dependency.scala

core/src/main/scala/spark/DiskSpillingCache.scala

core/src/main/scala/spark/Executor.scala

core/src/main/scala/spark/FetchFailedException.scala

core/src/main/scala/spark/HadoopRDD.scala

core/src/main/scala/spark/HadoopWriter.scala

core/src/main/scala/spark/Logging.scala

core/src/main/scala/spark/MapOutputTracker.scala

core/src/main/scala/spark/MesosScheduler.scala

core/src/main/scala/spark/NewHadoopRDD.scala

core/src/main/scala/spark/PairRDDFunctions.scala