bug#40671: [DOC] modify literal objects

[Michael Heerdegen]

Noam Postavsky <npostavs@gmail.com> writes:

> Paul Eggert <eggert@cs.ucla.edu> writes:
>
> >  (defvar gnus-article-mode-line-format-alist
> > -  (nconc '((?w (gnus-article-wash-status) ?s)
> > -      (?m (gnus-article-mime-part-status) ?s))
> > -    gnus-summary-mode-line-format-alist))
> > +  (nconc `((?w (gnus-article-wash-status) ?s)
> > +      (?m (gnus-article-mime-part-status) ?s)
> > +      ,@gnus-summary-mode-line-format-alist)))
>
> You meant to remove the nconc call too, right?

That, and, the code still makes literal lists to alist entries.  If you
modify these associations, you modify these literal lists.

I wonder how many of such uses of backquote expressions used to
construct alists are scattered throughout the Emacs code.

Michael.