> I have found what may be a bug either in tbl or in groff's \D
> request. Or I don't understand how either works.
It's a problem which I don't know to solve while keeping tbl device
independent.
In troff PS mode, the registers \n[.H] and \n[.V] (the resolution in
horizontal and vertical units,
Here's a simpler example in which the length of the
line produced by the \D'l' request differs twice in
nroff and troff:
.ll 36n
.br
The line below should by one symbol long (one "en"):
.br
.sp 1v
N - this is for reference.
.br
.if t .sp -0.8v
\D'l 1n 0'
Here's the nr
