* lisp/subr.el (add-to-history): Doc fix. (Bug#27494)

diff --git a/lisp/subr.el b/lisp/subr.el
index d9d918ed12d58891c4bc378cd02a4b52cd2d7f16..79a28d301e77b5ab872177f29f57ba9cc297d46c 100644 (file)
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1789,7 +1789,8 @@ Return the new history list.
 If MAXELT is non-nil, it specifies the maximum length of the history.
 Otherwise, the maximum history length is the value of the `history-length'
 property on symbol HISTORY-VAR, if set, or the value of the `history-length'
-variable.
+variable.  The possible values of maximum length have the same meaning as
+the values of `history-length'.
 Remove duplicates of NEWELT if `history-delete-duplicates' is non-nil.
 If optional fourth arg KEEP-ALL is non-nil, add NEWELT to history even
 if it is empty or a duplicate."