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| author | Stefan Kangas <stefan@marxist.se> | 2021-10-05 15:36:31 +0200 |
|---|---|---|
| committer | Stefan Kangas <stefan@marxist.se> | 2021-10-05 15:38:38 +0200 |
| commit | d652efcd087099c71cd76c4bbf2bbf04314844b4 (patch) | |
| tree | 828ea43e01d213d00ec2832d7c877d246f9328e6 /lisp/emacs-lisp/subr-x.el | |
| parent | 4bf532ee82473740cfd43c66ecbfe6cfddf99df9 (diff) | |
| download | emacs-d652efcd087099c71cd76c4bbf2bbf04314844b4.tar.gz | |
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.
Diffstat (limited to 'lisp/emacs-lisp/subr-x.el')
| -rw-r--r-- | lisp/emacs-lisp/subr-x.el | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/subr-x.el b/lisp/emacs-lisp/subr-x.el index ecd3ca831e8..8d6bb19fd49 100644 --- a/lisp/emacs-lisp/subr-x.el +++ b/lisp/emacs-lisp/subr-x.el @@ -208,7 +208,9 @@ The variable list SPEC is the same as in `if-let'." (string= string "")) (defsubst string-join (strings &optional separator) - "Join all STRINGS using SEPARATOR." + "Join all STRINGS using SEPARATOR. +Optional argument SEPARATOR must be a string, a vector, or a list of +characters; nil stands for the empty string." (mapconcat #'identity strings separator)) (define-obsolete-function-alias 'string-reverse 'reverse "25.1") |