fix checkstyle.

Author: zhtttylz

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSShell.java

@@ -1961,7 +1961,7 @@ public void testGet() throws IOException {
       private int count = 0;
       private final FsShell shell = new FsShell(conf);
 
-    	public String run(int exitcode, String... options) throws IOException {
+      public String run(int exitcode, String... options) throws IOException {
     	  String dst = new File(TEST_ROOT_DIR, fname + ++count)
             .getAbsolutePath();
     	  String[] args = new String[options.length + 3];