>> It should be fairly straightforward to add new hard-coded ligatures >> to the groff source, and to afmtodit. > > Well, the concept of ligatures in the today's font world is much more > complex than 30 years ago, so extending hard-coded values is a no-go > IMHO.
I agree, in principle. My thinking was that adding new hard-coded values is something that could be hacked in with minimal effort to someone familiar with the code, whereas making groff rethink its entire concept of ligatures is a much more substantial change.