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refactor(lib): use feature checks for backports

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Instead of imprecise version checks.

Fix: #6489
This commit is contained in:
Henrik Lissner
2022-06-21 21:28:07 +02:00
parent 00c75eddf8
commit 681d40ab58
1 changed files with 5 additions and 3 deletions
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8
core/core-lib.el
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@ -780,10 +780,12 @@ testing advice (when combined with `rotate-text').
;;
;;; Backports
(unless EMACS28+
;; `format-spec' wasn't autoloaded until 28
(autoload #'format-spec "format-spec")
;; `format-spec' wasn't autoloaded until 28.1
(unless (fboundp 'format-spec)
(autoload #'format-spec "format-spec"))
;; Introduced in Emacs 28.1
(unless (fboundp 'ensure-list)
(defun ensure-list (object)
"Return OBJECT as a list.
If OBJECT is already a list, return OBJECT itself. If it's