Re: [Groff] Diversion/trap help

[Tadziu Hoffmann]

> > Under what circumstances would a diversion that ends on the
> > bottom line of a page spring a footer trap even when the
> > diversion has been chopped?
> 
> As usual, please provide a small snippet which demonstrates
> the problematic behaviour.

It might be related to outputting the diversion in no-fill mode,
which behaves somewhat as if there were a ".br" at the end.
Try the following, and uncomment either the ".nf" or the ".br":


.\" This is for A4 paper.
.\" ----------------------------------------------------------------
.wh 0 HD
.wh -2c FT
.pl 29.7c
.po 2.5c
.ll 16c
.\" ----------------------------------------------------------------
.de HD
.ev 1
.lt 16c
.sp |1c-1v
.tl ''page % header''
.sp |2c
.ev
..
.de FT
.ev 1
.sp |29.7c-1c-1v
.tl ''page % footer''
.bp
.ev
..
.\" ----------------------------------------------------------------
.de XX
ps: def
/cm { 72 mul 2.54 div } def
/BPhook
{ gsave
  1 .9 .9 setrgbcolor 0 27.7 cm 21 cm  2   cm rectfill
  .9 1 .9 setrgbcolor 0  2   cm 21 cm 25.7 cm rectfill
  .9 .9 1 setrgbcolor 0  0   cm 21 cm  2   cm rectfill
  grestore }
def
..
.\" ----------------------------------------------------------------
\Y[XX]\c
.di xx
Hello,
.br
\!.sp 24.9c
world.
.br
.di
.\" .nf
.xx
.\" .br
.\" ----------------------------------------------------------------
.\" This is the end. Don't let blank lines creep in here.