[issue38584] argparse: Specifying a whitespace-only help message to a positional arg triggers an IndexError when displaying --help

[paul j3]

paul j3 <ajipanca at gmail.com> added the comment:

Just today on SO someone found a similar bug in the help format with metavars, that involved an unpacking the expected only one value, but got 2.

https://stackoverflow.com/questions/58541460/tuple-metavar-value-for-positional-argument-with-nargs-1

This had be raise years ago, as https://bugs.python.org/issue14074

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