[issue6760] patch to subprocess docs to better explain Popen's 'args' argument

[R. David Murray]

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

I'm happy to delete the two sentences about quoting.

As for -c, you are so right that it is cryptic.  In the new version of the patch I've changed the sentence to be as precise as possible, but I'm not at all convinced that it is less confusing.  This is why I think the API should be changed.

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Added file: http://bugs.python.org/file16107/subprocess-doc.patch

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