.Dd June 30, 2010
.Dt AT-INVALID 1
.Os OpenBSD
.Sh NAME
.Nm At-invalid
.Nd handling of an invalid AT&T UNIX argument
.Sh DESCRIPTION
no argument:
.At
.Pp
valid argument:
.At v7
.Pp
invalid argument:
.At murks "Sy" bold
.Pp
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