[bug #68519] [eqn, ms, grohtml] centered displays of eqn math don't center

"G. Branden Robinson" <[email protected]> Mon, 13 Jul 2026 10:50:15 -0400 (EDT)

Newsgroups	gmane.comp.printing.groff.bugs
Message-ID	<[email protected]>

URL:
  <https://savannah.gnu.org/bugs/?68519>

                 Summary: [eqn,ms,grohtml] centered displays of eqn math don't
center
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Mon 13 Jul 2026 02:50:07 PM UTC
                Category: General
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Unlocked
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Mon 13 Jul 2026 02:50:07 PM UTC By: G. Branden Robinson <gbranden>
Observed while working on bug #68499.

Not sure which part of the system is to blame.

Centered displays of "not math" _do_ work with (X)HTML output.


$ cat ATTIC/mathml-demo.ms
.LP
This is an
.I ms
document.
.DS C
.EQ
a times b inf c partial d == e != f +- g -> h <- i << j >> k grad
l del m cdot n cdots o approx p
.EN
.DE
.PP
Let's have a look at some \*[Q]technical\*[U] Greek letters.
.DS C
.EQ
ALPHA BETA CHI DELTA EPSILON ETA GAMMA IOTA KAPPA LAMBDA MU NU OMEGA
OMICRON PHI PI PSI RHO SIGMA TAU UPSILON XI ZETA

alpha beta chi delta epsilon eta gamma iota kappa lambda mu nu omega
omicron phi pi psi rho sigma tau upsilon xi zeta
.EN
.DE
.PP
Now let's have a centered display that lacks math.
.DS C
Achtung!
.DE


Resolving this is not an objective for _groff_ 1.25.







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