[issue22442] Deprecate PIPE with subprocess.check_call() and call()

[Akira Li]

Akira Li added the comment:

Martin, thank you for the review. As Matthias mentioned, the introduction of subprocess.run() perhaps deprecates this issue: old api should be left  alone to avoid breaking old code, new code should use new api, those who need old api (e.g., to write 2/3 compatible code) are expected to read the docs that already contain necessary warnings).

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<http://bugs.python.org/issue22442>
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