[SPARK-5765][Examples]Fixed word split problem in run-example and compute-classpath

Author: Venkata Ramana G <ramana.gollamudihuawei.com>

Author: Venkata Ramana Gollamudi <ramana.gollamudi@huawei.com>

Closes #4561 from gvramana/word_split and squashes the following commits:

285c8d4 [Venkata Ramana Gollamudi] Fixed word split problem in run-example and compute-classpath

bin/compute-classpath.sh

@@ -76,7 +76,7 @@ fi
 
 num_jars=0
 
-for f in ${assembly_folder}/spark-assembly*hadoop*.jar; do
+for f in "${assembly_folder}"/spark-assembly*hadoop*.jar; do
   if [[ ! -e "$f" ]]; then
     echo "Failed to find Spark assembly in $assembly_folder" 1>&2
     echo "You need to build Spark before running this program." 1>&2
@@ -88,7 +88,7 @@ done
 
 if [ "$num_jars" -gt "1" ]; then
   echo "Found multiple Spark assembly jars in $assembly_folder:" 1>&2
-  ls ${assembly_folder}/spark-assembly*hadoop*.jar 1>&2
+  ls "${assembly_folder}"/spark-assembly*hadoop*.jar 1>&2
   echo "Please remove all but one jar." 1>&2
   exit 1
 fi

bin/run-example

@@ -42,7 +42,7 @@ fi
 
 JAR_COUNT=0
 
-for f in ${JAR_PATH}/spark-examples-*hadoop*.jar; do
+for f in "${JAR_PATH}"/spark-examples-*hadoop*.jar; do
   if [[ ! -e "$f" ]]; then
     echo "Failed to find Spark examples assembly in $FWDIR/lib or $FWDIR/examples/target" 1>&2
     echo "You need to build Spark before running this program" 1>&2
@@ -54,7 +54,7 @@ done
 
 if [ "$JAR_COUNT" -gt "1" ]; then
   echo "Found multiple Spark examples assembly jars in ${JAR_PATH}" 1>&2
-  ls ${JAR_PATH}/spark-examples-*hadoop*.jar 1>&2
+  ls "${JAR_PATH}"/spark-examples-*hadoop*.jar 1>&2
   echo "Please remove all but one jar." 1>&2
   exit 1
 fi