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Fixes Issue #26373: subprocess.Popen.communicate now correctly ignores

BrokenPipeError when the child process dies before .communicate()
is called in more (all?) circumstances.
G
Gregory P. Smith ext:(%20%5BGoogle%20Inc.%5D) committed
1ef8c7e886ea5260e5a6967ec2b8a4c32640f1a8
Parent: ead9bfc