Re: master ff4de1b: Fix quoting style in Lisp comments

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

>> IMO, we should automatically display in comments and docstrings whatever
>> quote character the user prefers according to `text-quoting-style', and
>> automatically insert the correct quote character when typing "'".
>
> Patches welcome to make that happen.  One idea for implementation
> would be to use the display-table feature.

I can't see any way to limit `buffer-display-table' to docstrings.
Am I missing something?

Here's what I tried:

(define-minor-mode emacs-lisp-fancy-docstring-mode
  "Minor mode for fancy display of Emacs Lisp `docstrings'."
  :init-value nil
  (if emacs-lisp-fancy-docstring-mode
      (let ((table (or (copy-sequence standard-display-table)
                       (make-display-table))))
        (aset table ?` `[,(string-to-char (substitute-command-keys "`"))])
        (aset table ?' `[,(string-to-char (substitute-command-keys "'"))])
        (setq buffer-display-table table))
    (setq buffer-display-table nil)))

It does the job in the sense that it correctly displays these quotes in
docstrings, but it also does it in code, which makes things hard to
read.