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Date: Mon, 17 Oct 2022 04:26:55 +0200
From: =?utf-8?B?0L3QsNCx?= <nabijaczleweli@nabijaczleweli.xyz>
To: discuss@mandoc.bsd.lv
Subject: tbl broken on \_/\= for spanned columns
Message-ID: <20221017022655.pmcjidqfqcuwz74s@tarta.nabijaczleweli.xyz>
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Hi!

-- >8 --
=2EDd
=2EDt STTY 1
=2EOs
=2ESh DESCRIPTION
=2ETS
c s
l l .
\_
b	c
=2ETE
-- >8 --
(reduced from a real table, as in I did actually run into this)
is rendered as such by mandoc 1.14.5-1 off Debian and CVS HEAD:
-- >8 --
STTY(1)                     General Commands Manual                    STTY=
(1)

DESCRIPTION
     =E2=94=80
     b   c

Debian                         October 17, 2022                         Deb=
ian
-- >8 --
and as such if you 9s/b/bBbBbB/:
-- >8 --
STTY(1)                     General Commands Manual                    STTY=
(1)

DESCRIPTION
     =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80
     bBbBbB   c

Debian                         October 17, 2022                         Deb=
ian
-- >8 --

This is wrong: the cell that contains the line spans over both b and c.
Compare groff (1.22.4-6) with the correct render:
-- >8 --
DESCRIPTION
     =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80
     b   c
-- >8 --
and
-- >8 --
DESCRIPTION
     =E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=80=E2=94=
=80=E2=94=80=E2=94=80=E2=94=80
     bBbBbB   c
-- >8 --

Best,
=D0=BD=D0=B0=D0=B1

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