A streamlined preprocessor written in Fortran

[ivanpribec]

@urbanjost

Along those lines long ago I wrote a paper on the pros of
minimizing preprocessing and how to isolate it in wrapper routines
whenever possible. I might see if I can add that to the prep(1) or
pref(1) repository.

Have you still got a copy of the paper somewhere and if yes, could you make it publicly available?