> Why not allowing (not forcing) this additional first line also for
> every other files written in some `groff' language document?
You rather mean: Why not make groff accept such a line to invoke
preprocessors?
I think that this approach is too simplistic; for example, it doesn't
allow for preprocessor options.
> That is already done in `grog', but I don't know who to implement
> that in the `groff' program.
My gut feeling is that improving grog is more useful than spending
time to make groff do the same.
Werner
