sequence of groff' preprocessors in man page vs bug tracker

Hello Branden

Recently I noticed groff's bug tracker on savannah.gnu.org lists groff's
preprocessors in alphabetic order.  The man page of groff (as provided by with
package 1.23.0-10 in Debian 14/forky, testing), section `Preprocessors`
(about 40% in to the document) does not follow this sequence.

Is this discrepancy because the former is a sort by a computer, the later by
priority how frequently a typical user of groff likely engages one of them?
If not -- would it matter much if the two were in sync, i.e. both in
alphabetic order?

Second, since groff initially was / is more about technical communication /
documentation, could `chem` and again explicitly appear among the
preprocessors in the pull-down menu, too?  Maybe an entry for each of the
preprocessors the man page mentions, to the result the entry `Preprocessors
others/general` on the menu to become `Preprocessors, general` alone?

I don't consider either one as a bug and maybe there are reasons for the
current state I'm not (yet) aware.

Norwid