[TUHS] sequence of groff's preprocessors in man page vs bug tracker

[Douglas McIlroy via TUHS]

In the same semi-serious vein as the original observation, I suggest
that the preprocessors be listed in reverse topological order of
execution precedence. In general this will bring the more important
preprocessors to the top of the list. Unfortunately, it is not an
unambiguous recipe; it does not settle the relative order of
preprocessors that never interact, e.g. chem and grap. And, although
it gathers the precedence rules in one place, the reverse order may
cause some cognitive dissonance.

Doug