From d652efcd087099c71cd76c4bbf2bbf04314844b4 Mon Sep 17 00:00:00 2001
From: Stefan Kangas
Date: Tue, 5 Oct 2021 15:36:31 +0200
Subject: Make 'mapconcat' argument 'separator' optional

* src/fns.c (Fmapconcat): Make third 'separator' argument
optional.  (Bug#50965)
* doc/lispref/functions.texi (Mapping Functions): Update
documentation for above change.
* test/src/fns-tests.el (fns-tests-mapconcat): New test.

* doc/misc/cl.texi (Obsolete Setf Customization): Don't use third
mapconcat argument in example.
* lisp/emacs-lisp/subr-x.el (string-join): Doc fix.
---
 doc/misc/cl.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'doc/misc')

diff --git a/doc/misc/cl.texi b/doc/misc/cl.texi
index 1e5d40b0377..04e2c71a2b9 100644
--- a/doc/misc/cl.texi
+++ b/doc/misc/cl.texi
@@ -5030,7 +5030,7 @@ The above @code{incf} example could be written using
 @ignore
 (defmacro concatf (place &rest args)
   (gv-letplace (getter setter) place
-    (macroexp-let2 nil v (mapconcat 'identity args "")
+    (macroexp-let2 nil v (mapconcat 'identity args)
       (funcall setter `(concat ,getter ,v)))))
 @end ignore
 @end defmac
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