* lisp/emacs-lisp/seq.el (seq-concatenate): Auto-load it. Do not
merge to master. (Bug#45610)
(cl-defmethod seq-reverse ((sequence sequence))
(reverse sequence))
+;; We are autoloading seq-concatenate because cl-concatenate needs
+;; that when it's inlined, per the cl-proclaim in cl-macs.el.
+;;;###autoload
(cl-defgeneric seq-concatenate (type &rest sequences)
"Concatenate SEQUENCES into a single sequence of type TYPE.
TYPE must be one of following symbols: vector, string or list.