A file suffix for troff's output. (Was: pdfroff in groff 1.23.0.rc3 changes compared to 1.22.4)

[Ralph Corderoy]

Hi Branden,

> Perhaps you can think of some alternative names for distinguishing
> formatter output that we expect non-groff output drivers to be able to
> cope with from those that exercise the extension.

troff lays out its input.
The input has been placed on the page.
It is typeset.
It is set.

    troff chapter.tr >chapter.set
    grops chapter.set >chapter.ps

Short, simple, not already widely used by another program,
pronounceable, a clear derivation.

-- 
Cheers, Ralph.