[issue23994] argparse fails to detect program name when there is a slash at the end of the program's path

[Mert Bora Alper]

Mert Bora Alper added the comment:

> Thanks for the patch.  We'll want a unit test for the behavior before committing this.

You're welcome. Since I have no experience in writing unit tests, I don't really know where to start but I will try to do my best.

I added bethard to the Nosy List, as he is the author of argparse's test.

(In addition, you may want to change cpython/Lib/test/test_argparse.py:2163 )

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nosy: +bethard

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