Still print this, but use py2/py3 compat syntax

I realised being able to print is probably an essential part of this
test which I may have inadvertendly disabled, so correct that.
Fix docstring

This was copied from another paramterize call and I forgot to change
the parameters referred too.
remove unused var (fixes flakes tests)
fix issue407: fix addoption docstring to point to argparse instead of
optparse. Thanks Daniel D. Wright.
pypy has >21K tests now