Re: info: prev-line and scroll-backward are buggy on gnuplot.info

[Vincent Lefevre]

On 2022-11-12 09:27:34 +0200, Eli Zaretskii wrote:
> Instead of "Bugs", go to "Graphical_User_Interfaces" from the
> top-level menu.  You will see this:
> 
>   4 Graphical User Interfaces
>   ***************************
> 
>   Several graphical user interfaces have been written for `gnuplot` and
>   one for win32 is included in this distribution.  In addition, there is
>   a Python interface at http://py-gnuplot.darwinports.com/
>   (http://py-gnuplot.darwinports.com/)
> 
>      Also several X11 interfaces exist.  One of them is called xgfe. It
>   uses the Qt library and can be found on
>   http://www.flash.net/~dmishee/xgfe/xgfe.html
>   (http://www.flash.net/~dmishee/xgfe/xgfe.html)
> 
>      In addition three Tcl/Tk located at the usual Tcl/Tk repositories
>   exist.
> 
>      Bruce Ravel (ravel@phys.washington.edu) has written a new version of
>   gnuplot-mode for GNU emacs and XEmacs. This version is based on the
>   gnuplot.el file by Gershon Elber.  While the gnuplot CVS repository has
>   its own copy the most recent version of this package is available from
>   http://feff.phys.washington.edu/~ravel/software/gnuplot-mode/
>   (http://feff.phys.washington.edu/~ravel/software/gnuplot-mode/)
> 
>   * Menu:
> 
>   * Bugs::
> 
> See that "Bugs" at the end?  This is the problem: since "Bugs" is a
> top-level node, its presence in a level-1 node's menu makes the node
> tree not really a tree, so Backspace loops.

You mean that the menus can affect the structure of the document?
This seems a bad and unnecessary idea. Why not just considering
the "File:" lines of the info manual to deduce the structure of
the document?

Actually the issue is probably more that one has

File: gnuplot.info,  Node: Bugs,  Next: Concept_Index,  Prev: Terminal_types,  
Up: Top

with "Prev: Terminal_types" referencing to

File: gnuplot.info,  Node: Terminal_types,  Next: Bugs,  Prev: Commands,  Up: 
Top

which has "Next: Bugs", and following the "Next:", one reaches

File: gnuplot.info,  Node: External_libraries,  Prev: known_limitations,  Up: 
Bugs

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Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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