Whitespace.
diff --git a/Lib/encodings/hz.py b/Lib/encodings/hz.py
index 06f7d2f..383442a 100644
--- a/Lib/encodings/hz.py
+++ b/Lib/encodings/hz.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