.\"
.\" ----------------------------------------------------------------
.ll 5c
.po 3c
.sp 3c
.\" ----------------------------------------------------------------
.de Au
.gcolor red
.ta \\n(.luR
.ad l
\t\[em] \fI\\$1\fP
.ad b
.gcolor
..
.\" ----------------------------------------------------------------
.de AU
.gcolor blue
.br
.ds XX "  \(em \fI\\$1\fP
.nr XX \w'\\*(XX'
.if \\n(.n+\\n(XX<\\n(.l .sp -1
.ad r
.nh
\\*(XX
.br
.ad b
.hy
.gcolor
..
.\" ----------------------------------------------------------------
.de Tx
Either on the last line of the article, or \(em if that line is
too long to accomodate the end mark \(em on the following line.
..
.de Ty
So in any case the end mark should be flush right.
.Tx
..
.\" ----------------------------------------------------------------
.Tx
.Au "The author"
.sp
.Tx
.AU "The author"
.sp
.Tx
.AU "The author with a very long name"
.sp
.Ty
.Au "The author"
.sp
.Ty
.AU "The author"