[bug #43239] broken interaction between line numbering and diversions

[Dave]

URL:
  <http://savannah.gnu.org/bugs/?43239>

                 Summary: broken interaction between line numbering and
diversions
                 Project: GNU troff
            Submitted by: barx
            Submitted on: Tue 16 Sep 2014 08:54:19 PM CDT
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

.nm +1
Text before diversion.
Text before diversion.
Text before diversion.
Text before diversion.
Text before diversion.
Text before diversion.
Text before diversion.
Text before diversion.
.br
.di my_diversion
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
Diverted text.
.di
.my_diversion
Text after diversion.
Text after diversion.
Text after diversion.
Text after diversion.
Text after diversion.
Text after diversion.

The problem with the above input can be seen in either text (via nroff) or
PostScript output.  This behavior is not documented, and not what any user
would reasonably expect or want.

You can make the output sane by putting ".nm" immediately before the beginning
of the diversion's definition, and ".nm +0" immediately after the end of the
definition.  So if line numbering is turned on when a diversion definition
begins, groff ought to do this automatically.




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