Synchronize with PyXML 1.5.

Lib/xml/sax/_exceptions.py

@@ -21,6 +21,7 @@ def __init__(self, msg, exception=None):
         is optional."""
         self._msg = msg
         self._exception = exception
+        Exception.__init__(self, msg)
 
     def getMessage(self):
         "Return a message for this exception."

Lib/xml/sax/xmlreader.py

@@ -256,7 +256,7 @@ def getByteStream(self):
 
     def setCharacterStream(self, charfile):
         """Set the character stream for this input source. (The stream
-        must be a Python 1.6 Unicode-wrapped file-like that performs
+        must be a Python 2.0 Unicode-wrapped file-like that performs
         conversion to Unicode strings.)
 
         If there is a character stream specified, the SAX parser will