[issue8325] improve regrtest command line help

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

The numbers should definitely not be there.  I favor just documenting the -m version, and you'll see why in the attached patch.  I've incorporated Anatoly's improvement to the argument description and the option updates, and made some additional improvements.  I've also more extensively rewritten the -s docs, but Florent and I are still discussing where the pynexttest file should really go (currently -s is broken on trunk).  Or maybe we should just get rid of -s.

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nosy: +r.david.murray
Added file: http://bugs.python.org/file17056/regrtest-help.patch

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