Man page lists each option like "--this". But Usage message just lists them like "this". Try "xinput --help" to see them.
Both work, AFAIK, so this is just an inconsistency, not actually wrong? Cheers, Julien
JC> Both work, AFAIK, so this is just an inconsistency, not actually wrong? But neither even mention the status of the other. It is just like two different worlds. Schizophrenia.