fix (whitespace) FileTabCharacter: Line contains a tab character.

Author: techaddict

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

@@ -337,10 +337,10 @@ public void close() throws IOException {
       }
       super.close();
       if (handle != null) {
-    	if (!handle.getState().isFinal()) {
-    	  LOG.log(Level.WARNING, "Lost connection to spark application.");
-    	  handle.setState(SparkAppHandle.State.LOST);
-    	}
+        if (!handle.getState().isFinal()) {
+          LOG.log(Level.WARNING, "Lost connection to spark application.");
+          handle.setState(SparkAppHandle.State.LOST);
+        }
         handle.disconnect();
       }
     }