Update common.py

python/paddle/dataset/common.py

@@ -95,7 +95,7 @@ def download(url, module_name, md5sum, save_name=None):
                 total_length = int(total_length)
                 for data in r.iter_content(chunk_size=4096):
 		    if six.PY2:
-			data = six.b(data)
+                        data = six.b(data)
                     dl += len(data)
                     f.write(data)
                     done = int(50 * dl / total_length)