Package: groff-base
Version: 1.22.4-6
Severity: normal

Dear Maintainer,

I'm attaching a cut-down manual that illustrates this.

In short:
  cell  $ equation $    cell    cell
welds everything since some point together
(i.e. either cell I[equation]cellcell or cellI[equation]cellcell),
but appears to render the equation correctly,
adding data before and after the equation explodes the table in a
different way, but embedding it in T{ T} (or T{ .EQ .EN T}) renders
correctly.

All render correctly in troff (-Tps).

The output is
-- >8 --
SYNOPSIS
HISTORY
   Table 1
     Platform        Flags   API      Source          Notes
     
────────────────────────────────────────────────────────────────────────────
     illumos/SPARC   khx     SunOS    SPARC ID PROM   Can be configured per-zone
     illumos/x86  kHxpSunOS[M3]69(likewise)

     NetBSD/SPARC    khs     4.4BSD   SPARC ID PROM

   Table 2
     Platform                                             Flags   API      
Source          Notes
     
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────
     illumos/SPARC                                        khx     SunOS    
SPARC ID PROM   Can be configured per-zone
     illumos/x86                                       kHxpSunOSa [M3]69 
b(likewise)

     NetBSD/SPARC                                         khs     4.4BSD   
SPARC ID PROM

   Table 3
     Platform        Flags   API      Source          Notes
     
────────────────────────────────────────────────────────────────────────────
     illumos/SPARC   khx     SunOS    SPARC ID PROM   Can be configured per-zone
     illumos/x86     kHxp    SunOS    [M3]69          (likewise)

     NetBSD/SPARC    khs     4.4BSD   SPARC ID PROM

   Table 4
     Platform        Flags   API      Source          Notes
     
────────────────────────────────────────────────────────────────────────────
     illumos/SPARC   khx     SunOS    SPARC ID PROM   Can be configured per-zone
     illumos/x86     kHxp    SunOS    [M3]69          (likewise)

     NetBSD/SPARC    khs     4.4BSD   SPARC ID PROM
-- >8 --
with all "[M3]" instances italicised as expected.

Best,
наб

-- System Information:
Debian Release: 11.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 
'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-14-amd64 (SMP w/24 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_FIRMWARE_WORKAROUND, 
TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages groff-base depends on:
ii  libc6         2.31-13+deb11u3
ii  libgcc-s1     10.2.1-6
ii  libstdc++6    10.2.1-6
ii  libuchardet0  0.0.7-1

groff-base recommends no packages.

Versions of packages groff-base suggests:
ii  groff  1.22.4-6

-- no debconf information
'\" et
.\" SPDX-License-Identifier: 0BSD
.\"
.Dd
.Dt HOSTID 1
.Os
.
.Sh SYNOPSIS
.Nm
.
.EQ
delim $$
.EN
.
.Sh HISTORY
.Ss Table 1
.TS
lb lb lb lb lb
l  lb l  l  l  .
.
Platform        Flags   API     Source  Notes
_
.\" git head 2022-05-29, also see [1]
illumos/SPARC   khx     SunOS   SPARC ID PROM   Can be configured per-zone
illumos/x86     kHxp    SunOS   $ "[M3]" sup 69 $       (likewise)
\ \&
.\" CVS head 2022-05-29
NetBSD/SPARC    khs     4.4BSD  SPARC ID PROM
.TE
.
.Ss Table 2
.TS
lb lb lb lb lb
l  lb l  l  l  .
.
Platform        Flags   API     Source  Notes
_
.\" git head 2022-05-29, also see [1]
illumos/SPARC   khx     SunOS   SPARC ID PROM   Can be configured per-zone
illumos/x86     kHxp    SunOS   a $ "[M3]" sup 69 $ b   (likewise)
\ \&
.\" CVS head 2022-05-29
NetBSD/SPARC    khs     4.4BSD  SPARC ID PROM
.TE
.
.Ss Table 3
.TS
lb lb lb lb lb
l  lb l  l  l  .
.
Platform        Flags   API     Source  Notes
_
.\" git head 2022-05-29, also see [1]
illumos/SPARC   khx     SunOS   SPARC ID PROM   Can be configured per-zone
illumos/x86     kHxp    SunOS   T{
$ "[M3]" sup 69 $
T}      (likewise)
\ \&
.\" CVS head 2022-05-29
NetBSD/SPARC    khs     4.4BSD  SPARC ID PROM
.TE
.
.Ss Table 4
.TS
lb lb lb lb lb
l  lb l  l  l  .
.
Platform        Flags   API     Source  Notes
_
.\" git head 2022-05-29, also see [1]
illumos/SPARC   khx     SunOS   SPARC ID PROM   Can be configured per-zone
illumos/x86     kHxp    SunOS   T{
.EQ
"[M3]" sup 69
.EN
T}      (likewise)
\ \&
.\" CVS head 2022-05-29
NetBSD/SPARC    khs     4.4BSD  SPARC ID PROM
.TE

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