changed the title Popen() list-arg pager process without shell=True Popen() list-argument pager process without shell=True

Rowlando13 linked an issue

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When the first argument to subprocess.Popen is a list, setting
shell=True causes elements of the list to be discarded on POSIX
platforms.

Setting shell=False (the default) causes Popen() to invoke the first
argument of the list and pass the rest of the arguments using
"os.execvpe()-like behavior to execute the child program", per the
subprocess docs at

 * https://docs.python.org/3/library/subprocess.html

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