[bug #55027] [PATCH] contrib/hdtbl/hdmisc.tmac: Define register '<<'

[Bjarni Ingi Gislason]

URL:
  <https://savannah.gnu.org/bugs/?55027>

                 Summary: [PATCH] contrib/hdtbl/hdmisc.tmac: Define register
'<<'
                 Project: GNU troff
            Submitted by: bjarniig
            Submitted on: Thu 15 Nov 2018 02:08:51 AM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

    _______________________________________________________

Details:

>From e60fc6e09035f713fc6e7686cc37ee4e7ee4af78 Mon Sep 17 00:00:00 2001
From: Bjarni Ingi Gislason <address@hidden>
Date: Thu, 15 Nov 2018 02:01:17 +0000
Subject: [PATCH] contrib/hdtbl/hdmisc.tmac: Define register '<<'

  The numeric register '<<' is only used once in the "hdtbl"-source.
Its meaning is unknown.  Its value is set to '0' by groff, which can
issue a warning about this undefined register.

  This is one part of the bug-report #54473 Chess_board.roff: Many
registers are not defined.

Signed-off-by: Bjarni Ingi Gislason <address@hidden>
---
 contrib/hdtbl/hdmisc.tmac-u | 4 ++++
 1 file changed, 4 insertions(+)


diff --git a/contrib/hdtbl/hdmisc.tmac-u b/contrib/hdtbl/hdmisc.tmac-u
index ebbbddb3..5dd952bf 100644
--- a/contrib/hdtbl/hdmisc.tmac-u
+++ b/contrib/hdtbl/hdmisc.tmac-u
@@ -188,6 +188,10 @@ along with this program.  If not, see
<http://www.gnu.org/licenses/>.
 .\"    **      Seitenanfang zurueckgesetzt.                            **
 .\"    **      ganz richtig ist .sp + .br = .br + .sp = .sp            **
 .\"    ******************************************************************
+.\" Initialize register '<<'.  The meaning is unknown.  It is only
+.\"   used once (undefined) in the macro "t*SP".
+.nr << 0
+
 .de t*SP
 .  if (\\n[nl] < 0) \
 .    br                        \"      start very first page
-- 
2.19.1






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