bugGNU roff - Bugs: bug #43636, tbl: double horizontal rule in...

 
 

bug #43636: tbl: double horizontal rule in nroff

Submitter:  Anthony J. Bentley <anthonyjbentley>
Submitted:  Wed 19 Nov 2014 01:15:22 PM UTC
   
 
Category:  Preprocessor tbl Severity:  1 - Wish
Item Group:  Feature change Status:  Confirmed
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
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Wed 16 Feb 2022 03:30:45 AM UTC, comment #1: 

  If a double line is asked for in the output of "nroff", two lines
with an underscore are needed in the source.

  "troff" puts these two lines at the same two vertical positions as if
'=' were used.

  "troff" produces two lines for the '=' data entry.
It depends on the resolution of the output device (option -T)
whether the two lines get the same vertical position or not.

  This is material for tbl(1).

Bjarni Ingi Gislason <bjarniig>
Wed 19 Nov 2014 01:15:22 PM UTC, original submission:  

Consider the following (from fceux(6)):

.TS
center box;
cb | cb, c | ci.
NES Gamepad     Keyboard
=
Up      Keypad Up
.TE

nroff(1) displays it as:

                            ┌────────────┬──────────────┐
                            │NES Gamepad │   Keyboard   │
                            ├────────────┼──────────────┤
                            │   Up       │  Keypad Up   │
                            └────────────┴──────────────┘

Or in -Tascii:

                            +------------+--------------+
                            |NES Gamepad |   Keyboard   |
                            +------------+--------------+
                            |   Up       |  Keypad Up   |
                            +------------+--------------+

It would make more sense to render the middle horizontal line with a double border ('=' in ASCII, '═' in Unicode). Both  groff and mandoc render this with a double border in the middle.

Anthony J. Bentley <anthonyjbentley>

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-02-16 schwarze CategoryNone Preprocessor tbl
        Severity3 - Normal 1 - Wish
        Item GroupNone Feature change
        StatusNone Confirmed

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