And of course, I forgot to add -a to the usage.
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@ -142,7 +142,7 @@ static void
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usage(void)
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{
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fprintf(stderr, "usage: who [-bHmqsTu] [am I] [file]\n");
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fprintf(stderr, "usage: who [-abHmqsTu] [am I] [file]\n");
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exit(1);
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}
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