Something I didn't know about our fellow correspondent Doug McIlroy: <https://thenewstack.io/pipe-how-the-system-call-that-ties-unix-together-came-about>
Groff would be terribly less useful if it didn't adhere to this standard. I've always thought of this in terms of groff being a filter, but I can't remember where I got the "filter" terminology from. And can anyone tell me why Donald Knuth did not design TeX this way? This has always puzzled me and is the main reason I rarely use it. Thanks, -- Steve -- Steve Izma - Home: 35 Locust St., Kitchener, Ontario, Canada N2H 1W6 E-mail: si...@golden.net phone: 519-745-1313 cell: 519-998-2684 == I have always felt the necessity to verify what to many seemed a simple multiplication table. -- Ilya Ehrenburg (Soviet author and critic; he's not talking about mathematics)