message, and tries to make the messages more consistent and helpful when
the wrong number of arguments or duplicate keyword arguments are supplied.
Comes with more tests for test_extcall.py and and an update to an error
message in test/output/test_pyexpat.
information from the Expat library that is not part of its public API.
Do not print this information as the format of the string may (and will)
change as Expat evolves.
Add additional tests to make sure the ParserCreate() function raises the
right exceptions on illegal parameters.
Ka-Ping Yee