From bf37e36d15d85f10f43152cb35b52358132e6887 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrewor14@gmail.com>
Date: Fri, 16 May 2014 22:21:22 -0700
Subject: [PATCH] Minor changes

---
 bin/pyspark                                              | 2 +-
 bin/spark-shell                                          | 2 +-
 .../main/scala/org/apache/spark/deploy/SparkSubmit.scala | 9 ++++-----
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/bin/pyspark b/bin/pyspark
index 10454375c6cdb..9e1364e44c8c4 100755
--- a/bin/pyspark
+++ b/bin/pyspark
@@ -25,7 +25,7 @@ export SPARK_HOME="$FWDIR"
 
 SCALA_VERSION=2.10
 
-if [[ "$@" = *--help ]] || [[ "$@" = *--h ]]; then
+if [[ "$@" = *--help ]] || [[ "$@" = *-h ]]; then
   echo "Usage: ./bin/pyspark [options]"
   ./bin/spark-submit --help 2>&1 | grep -v Usage 1>&2
   exit 0
diff --git a/bin/spark-shell b/bin/spark-shell
index 36129a552852f..c158683ab3f99 100755
--- a/bin/spark-shell
+++ b/bin/spark-shell
@@ -28,7 +28,7 @@ esac
 # Enter posix mode for bash
 set -o posix
 
-if [[ "$@" = *--help ]] || [[ "$@" = *--h ]]; then
+if [[ "$@" = *--help ]] || [[ "$@" = *-h ]]; then
   echo "Usage: ./bin/spark-shell [options]"
   ./bin/spark-submit --help 2>&1 | grep -v Usage 1>&2
   exit 0
diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
index 04245223330e4..a99b2176e2b5e 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
@@ -334,11 +334,10 @@ object SparkSubmit {
    * no files, into a single comma-separated string.
    */
   private[spark] def mergeFileLists(lists: String*): String = {
-    lists
-      .filter(_ != null)
-      .filter(_ != "")
-      .flatMap(_.split(","))
-      .mkString(",")
+    val merged = lists.filter(_ != null)
+                      .flatMap(_.split(","))
+                      .mkString(",")
+    if (merged == "") null else merged
   }
 }