Dear Maintainer,

Correct (minimised example):
-- >8 --
% echo a | pr -f | cat -A | tr -s ' '
$
$
2023-04-30 22:09 Page 1$
$
$
a$
^L
-- >8 --

Incorrect:
-- >8 --
% echo a | pr -fd | cat -A | tr -s ' '
$
$
2023-04-30 22:10 Page 1$
$
$
a$
$
$
^L
-- >8 --

POSIX mandates that -d doubles any ejected newline.
pr(1) uses the same description as the posix short-name.

Correct output would be:
-- >8 --
% echo a | out/cmd/pr     -fdm   | cat -A | tr -s ' '
$
$
2023-04-30 22:11 Page 1$
$
$
a$
$
^L
-- >8 --
i.e. the original newline + another empty line, then page feed.

Best,
наб