Ultrix-3.1/src/cmd/otroff/tmac.an

.de th
.if t .so /usr/lib/tmac/tmac.an6t
.if n .so /usr/lib/tmac/tmac.an6n
.t1 "\\$1" "\\$2" "\\$3"
..
.de TH
.rn TH xx
.so /usr/lib/tmac/tmac.an.new
.TH "\\$1" "\\$2" "\\$3" "\\$4" "\\$5"
.rm xx
..