On Sat, Jan 18, 2025 at 08:17:11PM +0100, onf wrote: > On Sat Jan 18, 2025 at 8:09 PM CET, onf wrote: > > [...] > > > \Z'123456789' > > > .rj > > > 123456789 > > > > $ groff -Tutf8 | sed "s/ /'/g" > > ''''''''''''''''''''123456789 > > '''''''''''''''''''''''''''''''123456789 > > > > Huh. I get what you meant by "right-justified against what?" now. > > It might just be that my conclusion of \Z causing right justification > > when centering is enabled was wrong. I don't actually know what groff > > does; its source code is too complicated for me to read. > > > > By the way, I tried this with neatroff and it works as expected: > > $ neatroff/roff -F. << EOF | neatpost/pdf -F. -pa4 > t.pdf > > .pl 29.7c > > .ll 21c > > .po 0 > > .ad c > > \Z'123456789' > > .br > > .ad r > > 123456789 > > EOF > > > > The first 123456789 is indented by half the line length, whereas the > > second one is set flush against the right margin. > > [...] > > Ugh. It took me too long to realize what's going on, but neatroff's > behavior explains it. The line is not right adjusted. It's centered, > but the contents of \Z don't contribute to the line's width, so it's > an equivalent of \& being centered. In other words, the text enclosed > with \Z is indented by half the line length.
That's what I thought. :-) > > ~ onf > -- Walter
