HDFS-15895 : Remove redundant String#format in DFSAdmin#printOpenFiles (apache#2772)

Author: virajjasani

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java

@@ -1024,14 +1024,14 @@ public int listOpenFiles(String[] argv) throws IOException {
 
   private void printOpenFiles(RemoteIterator<OpenFileEntry> openFilesIterator)
       throws IOException {
-    System.out.println(String.format("%-20s\t%-20s\t%s", "Client Host",
-          "Client Name", "Open File Path"));
+    System.out.printf("%-20s\t%-20s\t%s%n", "Client Host",
+        "Client Name", "Open File Path");
     while (openFilesIterator.hasNext()) {
       OpenFileEntry openFileEntry = openFilesIterator.next();
-      System.out.println(String.format("%-20s\t%-20s\t%20s",
+      System.out.printf("%-20s\t%-20s\t%20s%n",
           openFileEntry.getClientMachine(),
           openFileEntry.getClientName(),
-          openFileEntry.getFilePath()));
+          openFileEntry.getFilePath());
     }
   }