diff options
Diffstat (limited to 'lisp/emacs-lisp')
| -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") |