bug#38461: Incompatibility between reftex and turn-on-window-margin-mode

[Eli Zaretskii]

> From: Roberto Zamparelli <roberto.zamparelli@unitn.it>
> Date: Mon, 2 Dec 2019 21:34:47 +0100
> 
> If I add to .emacs with AUCTeX the following:
> 
> (add-hook 'text-mode-hook 'turn-on-window-margin-mode)
> (add-hook 'LaTeX-mode-hook 'turn-on-reftex)
> (setq reftex-enable-partial-scans t) 
> (setq reftex-save-parse-info t)
> (setq reftex-use-multiple-selection-buffers t)
> (setq reftex-plug-into-AUCTeX t)
> 
> Reftex will not be loaded automatically by loading a TeX file. It can be
> loaded manually with reftex-mode, but it will NOT parse a master file
> declaration at the end, e.g.
> 
> %%% Local Variables:
> %%% mode: latex
> %%% TeX-master: "my-master"
> %%% End:
> 
> It is indeed impossible to manually set the master file (with C-c _) to 
> anything different from the local file.
> When I remove the hook turn-on-window-margin-mode, from .emacs REFTeX resumes 
> working normally.

What is turn-on-window-margin-mode?  What does it do?  I don't see
this function in Emacs.

Thanks.