HADOOP-14059. typo in s3a rename(self, subdir) error message. Contributed by Steve Loughran.

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java

@@ -813,7 +813,7 @@ private boolean innerRename(Path src, Path dst)
       //Verify dest is not a child of the source directory
       if (dstKey.startsWith(srcKey)) {
         throw new RenameFailedException(srcKey, dstKey,
-            "cannot rename a directory to a subdirectory o fitself ");
+            "cannot rename a directory to a subdirectory of itself ");
       }
 
       List<DeleteObjectsRequest.KeyVersion> keysToDelete = new ArrayList<>();