bug#74110: [PATCH] Add folding support for TeX dashes

[Paul Nelson]

Hi Arash,

>
> what about users who use folding only and not symbol-prettification?
> There is a feature overlap here, but I'm not sure if we should drop your
> changes from folding.  Maybe we should guard these overlaps so they
> don't kick in when `prettify-symbols-mode' is non-nil?  WDYT?
>

>From what I can tell, we don't need to worry about overlaps, which
already happens with stuff like "\alpha" that is in both
tex--prettify-symbols-alist and LaTeX-fold-math-spec-list.

The pros/cons of the quote/dash folding code, as I see it:

(1) Users who use prettification can simply add

(dolist (sym '(("``" . ?“) ("''" . ?”)))
  (add-to-list 'tex--prettify-symbols-alist sym))

to their config (or submit a patch to tex-mode), while those who don't
use prettification can turn it on anyway and do

(setq prettify-symbols-alist '(("``" . ?“) ("''" . ?”) ("--" . 8211)
("---" . 8212)))

(2) With the folding approach, users can control it via TeX-fold-*
along with all the other folding.

My overall feeling is that the quote/dash folding code isn't really
necessary (and expands the code base, docs and defcustoms), so might
as well be removed, but I won't complain if you or others see the
balance differently.

Thanks, best,

Paul