[issue45721] Improve error message for OS command entered at >>> prompt

[Terry J. Reedy]

Change by Terry J. Reedy <tjreedy at udel.edu>:


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resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> Attempt to give better errors for pip commands typed into the REPL

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45721>
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