Raise statement normalization in Lib/.
diff --git a/Lib/mimetools.py b/Lib/mimetools.py
index 0553989..0112f48 100644
--- a/Lib/mimetools.py
+++ b/Lib/mimetools.py
@@ -162,8 +162,7 @@
     if encoding in decodetab:
         pipethrough(input, decodetab[encoding], output)
     else:
-        raise ValueError, \
-              'unknown Content-Transfer-Encoding: %s' % encoding
+        raise ValueError('unknown Content-Transfer-Encoding: %s' % encoding)
 
 def encode(input, output, encoding):
     """Encode common content-transfer-encodings (base64, quopri, uuencode)."""
@@ -181,8 +180,7 @@
     if encoding in encodetab:
         pipethrough(input, encodetab[encoding], output)
     else:
-        raise ValueError, \
-              'unknown Content-Transfer-Encoding: %s' % encoding
+        raise ValueError('unknown Content-Transfer-Encoding: %s' % encoding)
 
 # The following is no longer used for standard encodings