bug#57470: fill-column icon on the ruler is wrongly placed

[uzibalqa]

------- Original Message -------
On Monday, August 29th, 2022 at 11:26 AM, Eli Zaretskii <eliz@gnu.org> wrote:


> > Date: Mon, 29 Aug 2022 05:09:32 +0000
> > From: uzibalqa via "Bug reports for GNU Emacs,
> > the Swiss army knife of text editors" bug-gnu-emacs@gnu.org
> > 
> > Have changed fill-column through mode-hooks for org-mode and text-mode only 
> > as follows
> > 
> > (defun colum-property () (setq fill-column 72))
> > 
> > (add-hook 'org-mode-hook #'colum-property)
> > 
> > (add-hook 'text-mode-hook #'colum-property)
> > 
> > But when I load a "tex" or "texi" file, then call "M-x ruler-mode", the 
> > ruler takes the
> > value 72 for fill-column when displaying the fill-column icon on the ruler.
> 
> 
> Because the modes for TeX and Texinfo files inherit from Text mode.
> For example, the doc string for latex-mode says, inter alia:
> 
> Entering Latex mode runs the hook ‘text-mode-hook’, then
> ‘tex-mode-hook’, and finally ‘latex-mode-hook’. When the special
> subshell is initiated, ‘tex-shell-hook’ is run.
> 
> Note the reference to text-mode-hook.
> 
> This is not a bug.

It is very confusing.  I thought it was related to prog-mode-hook (reason I 
made request
for way to list associated modes).  Looks like there is ever greater need now 
for things
that help us without excessive need to go into internals.  Am quite sure that 
emacs internal
design is rather atrocious for even experienced programmers to understand 
efficiently.