Yep, I was really curious to see if he had finally given up and gone to TeX, Indesign, or the like. I guess that if one's not dealing with a lot of math, groff

Yep, I was really curious to see if he had finally given up and gone to TeX, Indesign, or the like. I guess that if one's not dealing with a lot of math, groff is enough for many typesetting jobs. I'm curious as to which version of groff they used. Heirloom groff? GNU groff? hmm...