Raise statement normalization in Lib/.
diff --git a/Lib/encodings/utf_16.py b/Lib/encodings/utf_16.py
index cf096b5..5500c06 100644
--- a/Lib/encodings/utf_16.py
+++ b/Lib/encodings/utf_16.py
@@ -132,7 +132,7 @@
         elif byteorder == 1:
             self.decode = codecs.utf_16_be_decode
         elif consumed>=2:
-            raise UnicodeError,"UTF-16 stream does not start with BOM"
+            raise UnicodeError("UTF-16 stream does not start with BOM")
         return (object, consumed)
 
 ### encodings module API