Move gensym to core Elisp

* doc/lispref/symbols.texi (Creating Symbols): Mention gensym right
after make-symbol.
* etc/NEWS: Mention.
* lisp/emacs-lisp/cl-macs.el (cl--gensym-counter): Alias to
gensym-counter.
(cl-gensym): Alias to gensym.
* lisp/emacs-lisp/cl.el: Remove gensym from list of aliases.
* lisp/emacs-lisp/edebug.el (edebug-make-enter-wrapper):
* lisp/emacs-lisp/ert-x.el (ert-with-message-capture):
(ert--expand-should-1, ert--expand-should):
(ert--should-error-handle-error):
* lisp/emacs-lisp/generator.el (cps--gensym):
* lisp/emacs-lisp/gv.el (setf):
* lisp/emacs-lisp/inline.el (inline--do-letlisteval):
* lisp/emacs-lisp/pcase.el (pcase--make-docstring, pcase-dolist):
(pcase--funcall, pcase--u1): Use gensym.
* lisp/subr.el (gensym-counter): New variable.
(gensym): New function, assimilated from cl-lib.

1 files changed, 2 insertions, 2 deletions

diff --git a/lisp/emacs-lisp/gv.el b/lisp/emacs-lisp/gv.el
index a8b8974cb4f..42b1c216956 100644
--- a/lisp/emacs-lisp/gv.el
+++ b/lisp/emacs-lisp/gv.el
@@ -431,7 +431,7 @@ The return value is the last VAL in the list.
            ;; code is large, but otherwise results in more efficient code.
            `(if ,test ,(gv-get then do)
               ,@(macroexp-unprogn (gv-get (macroexp-progn else) do)))
-         (let ((v (make-symbol "v")))
+         (let ((v (gensym "v")))
            (macroexp-let2 nil
                gv `(if ,test ,(gv-letplace (getter setter) then
                                 `(cons (lambda () ,getter)
@@ -456,7 +456,7 @@ The return value is the last VAL in the list.
                                     (gv-get (macroexp-progn (cdr branch)) do)))
                            (gv-get (car branch) do)))
                        branches))
-         (let ((v (make-symbol "v")))
+         (let ((v (gensym "v")))
            (macroexp-let2 nil
                gv `(cond
                     ,@(mapcar