Bug#989029: info: scroll-backward is buggy

[Vincent Lefevre]

Control: unmerge -1
Control: retitle -1 gnuplot-doc: spurious menu at the end of Section 4 breaks navigation

On 2022-11-22 15:08:10 +0100, Vincent Lefevre wrote:
> doc2texi.el has
> 
> (defvar d2t-terminal-directory (expand-file-name "../term/")
>   "Location of .trm files in gnuplot source tree.")
> 
> If I understand correctly, this is relative to the build directory
> (since the current working directory is there), while this should have
> been relative to the source directory. A general fix is not obvious:
> one would have to pass $(srcdir) to the file, unless there is some
> Emacs variable that already contains the information. However, for
> Debian, the build directory is at some fixed place in the source tree,
> so that this can be fixed by just adapting the relative path.
> 
> Patch attached.

This solves the inclusion of the terminal types, but unfortunately,
the buggy menu is a separate problem. In the gnuplot.info.gz file
with the patch:

[...]
4.1.54 xlib
-----------
The 'xlib' terminal driver supports the X11 Windows System.  It
generates gnuplot_x11 commands, but sends them to the output file
specified by 'set output '<filename>''.  'set term x11' is equivalent to
'set output "|gnuplot_x11 -noevents"; set term xlib'.  'xlib' takes the
same set of options as 'x11'."
* Menu:
* Bugs::
File: gnuplot.info,  Node: Bugs,  Next: Concept_Index,  Prev: Terminal_types,  Up: Top
5 Bugs
******
[...]

i.e. the menu is still there, so that going backward from Section 5
goes to Section 5.2 instead of 4.1.54.

-- 
Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)