Nit fix

Author: gaborgsomogyi

launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java

@@ -300,8 +300,8 @@ private List<String> buildSparkSubmitCommand(Map<String, String> env)
   private void checkJavaOptions(String javaOptions) {
     if (!isEmpty(javaOptions) && javaOptions.contains("Xmx")) {
       String msg = String.format("Not allowed to specify max heap(Xmx) memory settings through " +
-          "java options (was %s). Use the corresponding --driver-memory or " +
-          "spark.driver.memory configuration instead.", javaOptions);
+        "java options (was %s). Use the corresponding --driver-memory or " +
+        "spark.driver.memory configuration instead.", javaOptions);
       throw new IllegalArgumentException(msg);
     }
   }