[issue13238] Add shell command helpers to shutil module

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

>  default - str + shutil.quote_ascii_whitespace
>  !q - str + shlex.quote
>  !u - unquoted (i.e. no conversion, str.format default behaviour)

The default doesn't look very understandable to me. Why would you quote only some characters and not all of them?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13238>
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