Removed whitespace in otherwise empty lines in code snippet in

big_data_frameworks_spark.md.

doc.zih.tu-dresden.de/docs/software/big_data_frameworks_spark.md

@@ -131,25 +131,25 @@ example below:
     #SBATCH --exclusive
     #SBATCH --mem=60G
     #SBATCH --job-name="example-spark"
-    
+
     ml Spark/3.0.1-Hadoop-2.7-Java-1.8-Python-3.7.4-GCCcore-8.3.0
-    
+
     function myExitHandler () {
         stop-all.sh
     }
-    
+
     #configuration
     . framework-configure.sh spark $SPARK_HOME/conf
-    
+
     #register cleanup hook in case something goes wrong
     trap myExitHandler EXIT
-    
+
     start-all.sh
-    
+
     spark-submit --class org.apache.spark.examples.SparkPi $SPARK_HOME/examples/jars/spark-examples_2.12-3.0.1.jar 1000
-    
+
     stop-all.sh
-    
+
     exit 0
     ```