[issue35899] '_is_sunder' function in 'enum' module fails on empty string

[Maxwell]

Maxwell <maxwellpxt at gmail.com> added the comment:

Typo fix on solution 2:

def _is_sunder(name):
    """Returns True if a _sunder_ name, False otherwise."""
    return (name[:1] == name[-1:] == '_' and
            name[1:2] != '_' and
            name[-2:-1] != '_' and
            len(name) > 2)

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<https://bugs.python.org/issue35899>
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