R. David Murray <rdmur...@bitdance.com> added the comment:

I like it, myself, though there is some danger in promoting the idea that this 
is a "safe" operation.  It theoretically should be, but it increases the attack 
surface slightly if you actually use it (that is, using shell=False is always 
safer, by at least a small margin).  Maybe a mention of that in the docs would 
be enough, though.

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nosy: +r.david.murray

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<https://bugs.python.org/issue22454>
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