[issue7642] [patch] Minor improvement in os.system doc

[Sandro Tosi]

Sandro Tosi <sandro.tosi at gmail.com> added the comment:

Hello,
I took the freedom to refresh this patch, clarifying the first Val's addition (as requested by Éric) and reformat the whole system() section to wrap a column 80.

Regards,
Sandro

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nosy: +sandro.tosi
Added file: http://bugs.python.org/file19164/issue7642.patch

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