[issue41818] Lib/pty.py major revision

[Soumendra Ganguly]

Change by Soumendra Ganguly <soumendra at tamu.edu>:


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pull_requests: +22408
pull_request: https://github.com/python/cpython/pull/23526

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41818>
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