Whitespace.
diff --git a/Lib/encodings/gbk.py b/Lib/encodings/gbk.py
index 09123ae..1b45db8 100644
--- a/Lib/encodings/gbk.py
+++ b/Lib/encodings/gbk.py
@@ -16,11 +16,14 @@
class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
codecs.IncrementalEncoder):
codec = codec
+
class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
codecs.IncrementalDecoder):
codec = codec
+
class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
codec = codec
+
class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
codec = codec