URL:
<https://savannah.gnu.org/bugs/?64300>
Summary: [troff] diagnose error when 'sp used when not on a
page
Group: GNU roff
Submitter: gbranden
Submitted: Mon 12 Jun 2023 09:31:41 PM UTC
Category: Core
Severity: 3 - Normal
Item Group: Warning/Suspicious 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: Mon 12 Jun 2023 09:31:41 PM UTC By: G. Branden Robinson <gbranden>
$ cat EXPERIMENTS/no-break-sp-request-behavior-exhibit.roff
'sp 3v \" does nothing because not on a page yet: diagnose error?
foo
.br
bar
'sp 3v
baz
$ nroff EXPERIMENTS/no-break-sp-request-behavior-exhibit.roff | cat -n | head
1 foo
2
3
4
5 bar baz
6
7
8
9
10
The formatter sullenly ignores a no-break `sp` request if the vertical drawing
position is negative.
This is _not_ what DWB or Heirloom Doctools nroff do.
$ ./bin/nroff ./no-break-sp-request-behavior-exhibit.roff | cat -n | head
1
2
3 foo
4
5
6 bar baz
7
8
9
10
We should either align with them or throw an error and document the
difference.
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