Follow-up Comment #2, bug #67401 (group groff):

[comment #0 original submission:]
> DWB gets the footer placement right.  (It formats the text on two pages
> because it doesn't honor the `PO` register setting.  We don't have that
> documented as a GNU (or even Berkeley) extension so I guess I get to research
> its history.)

Nah, it goes all the way back to V7 and appears in the `NP` (internal "new
page" macro) definition.


.if \\n(PO>0 .po \\n(POu


https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/lib/tmac/tmac.s

We can see above that that a `PO` value of `0` is not honored (`if \\n(PO>0`).
 AT&T bug, I guess.


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