> > That gtroff allows those spaces is an extension to the > > original troff spec, and in gpic it was simply not > > implemented to date.
> Maybe I get you wrong, but spaces between . and macronames > are possible in any *roff. (I don't know if it is written > in the spec...) You're right about this and I was wrong. I'd never realized this is something also allowed by AT&T [nt]roff because it's a feature I never use myself. But it's documented in the User's guide since at least 1979, and the oldest nroff version I have access to (nroff on VAX ULTRIX 4.5) does indeed support it.