From: Stefan Kangas <stefan@marxist.se>
Date: Thu, 4 Nov 2021 19:20:07 +0000 (+0100)
Subject: * lisp/custom.el (defgroup): Document the :prefix keyword.
X-Git-Tag: emacs-28.0.90~122
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=e3c3c78365c6430b0e9015c1a3701518de4680cd;p=emacs.git

* lisp/custom.el (defgroup): Document the :prefix keyword.
---

diff --git a/lisp/custom.el b/lisp/custom.el
index 858b158051c..cc817403871 100644
--- a/lisp/custom.el
+++ b/lisp/custom.el
@@ -507,7 +507,11 @@ The remaining arguments should have the form
    [KEYWORD VALUE]...
 
 For a list of valid keywords, see the common keywords listed in
-`defcustom'.
+`defcustom'.  The keyword :prefix can only be used for
+customization groups, and means that the given string should be
+removed from variable names before creating unlispified names,
+when the user option `custom-unlispify-remove-prefixes' is
+non-nil.
 
 See Info node `(elisp) Customization' in the Emacs Lisp manual
 for more information."