[doc] fix minor typo for argparse (GH-28451)

"A JSONDecodeError" instead of "An JSONDecodeError".
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Louis Sautier 2021-09-28 13:00:51 +02:00 committed by GitHub
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@ -1109,7 +1109,7 @@ Anything with more interesting error-handling or resource management should be
done downstream after the arguments are parsed.
For example, JSON or YAML conversions have complex error cases that require
better reporting than can be given by the ``type`` keyword. An
better reporting than can be given by the ``type`` keyword. A
:exc:`~json.JSONDecodeError` would not be well formatted and a
:exc:`FileNotFound` exception would not be handled at all.