Subject: bug#37774: 27.0.50; new :extend attribute broke visuals of all themes and other packages

From: Eli Zaretskii <[email-masked]>
Date: Wed, 16 Oct 2019 20:33:16 +0300

> Date: Wed, 16 Oct 2019 15:18:13 +0200
> From: Ergus <[email-masked]>
> Cc: [email-masked], [email-masked]
> 
> Do we have something in defface that we can "recommend" to conditionally
> specify this attribute when version >= 27 only (maybe a syntax sugar)?

(if (>= emacs-major-version 27)
    (defface foo...) ; for Emacs 27 and later
  (defface foo...)   ; for Emacs 26 and older

> In any case maybe we need to add a recommendation in NEWS about how to
> update.

Do you really think the above needs to be in NEWS?