[bug #65843] [mm] `VL` macro misbehaves with overlong marks

[G. Branden Robinson]

URL:
  <https://savannah.gnu.org/bugs/?65843>

                 Summary: [mm] `VL` macro misbehaves with overlong marks
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Thu 06 Jun 2024 02:39:05 AM UTC
                Category: Macro package mm
                Severity: 3 - Normal
              Item Group: Incorrect behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Thu 06 Jun 2024 02:39:05 AM UTC By: G. Branden Robinson <gbranden>

$ cat EXPERIMENTS/VL-demo.mm 
.P
This is a demonstration of
.I mm 's
variable-item macro
.B VL .
.VL 10 5
.LI foo
The \(lqbodies\(rq of these list items are indented 10n
from the left margin.
.LI bar
The mark is idented 5n
from the left margin.
.LI "oversized\ bazqux"
This mark is oversized.
But it should not overprint.
$ nroff -mm EXPERIMENTS/VL-demo.mm | cat -s

                                   ‐ 1 ‐

       This is a demonstration of mm’s variable‐item macro VL.

            foo  The  “bodies” of these list items are indented 10n
                 from the left margin.

            bar  The mark is idented 5n from the left margin.

            oversized baThis mark is oversized.  But it should  not
                 overprint.



PostScript output is similar, except it really does overprint
("constructively").

DWB 3.3 _mm_ does not behave this way.







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