bpo-34812: subprocess._args_from_interpreter_flags(): add isolated (GH-10675)

The "-I" command line option (run Python in isolated mode) is now
also copied by the multiprocessing and distutils modules when
spawning child processes. Previously, only -E and -s options (enabled
by -I) were copied.

subprocess._args_from_interpreter_flags() now copies the -I flag.
3 files changed