Backport commit 9c3883b from Emacs master branch

* lisp/org-mouse.el (org-mouse-do-remotely): Prefer point-marker to
  copy-marker of point.
* lisp/ob-core.el (org-babel-insert-result): Prefer point-min-marker and
  point-max-marker.

Conflicts:
  lisp/org-mouse.el

lisp/ob-core.el

@@ -2043,8 +2043,8 @@ code ---- the results are extracted in the syntax of the source
 				 t info hash indent)))
 	     (results-switches
 	      (cdr (assoc :results_switches (nth 2 info))))
-	     (visible-beg (copy-marker (point-min)))
-	     (visible-end (copy-marker (point-max)))
+	     (visible-beg (point-min-marker))
+	     (visible-end (point-max-marker))
 	     ;; When results exist outside of the current visible
 	     ;; region of the buffer, be sure to widen buffer to
 	     ;; update them.

lisp/org-mouse.el

@@ -1008,7 +1008,7 @@ This means, between the beginning of line and the point."
 	(let ((endmarker (with-current-buffer buffer
 			   (org-end-of-subtree nil t)
 			   (unless (eobp) (forward-char 1))
-			   (copy-marker (point)))))
+			   (point-marker))))
 	  (org-with-remote-undo buffer
 	    (with-current-buffer buffer
 	      (widen)
@@ -1018,7 +1018,7 @@ This means, between the beginning of line and the point."
 		(and (outline-next-heading)
 		     (org-flag-heading nil)))   ; show the next heading
 	      (org-back-to-heading)
-	      (setq marker (copy-marker (point)))
+	      (setq marker (point-marker))
 	      (goto-char (max (point-at-bol) (- (point-at-eol) anticol)))
 	      (funcall command)
 	      (message "_cmd: %S" org-mouse-cmd)

lisp/org-table.el

@@ -3183,9 +3183,9 @@ with the prefix ARG."
     (save-excursion
       ;; Insert a temporary formula at right after the table
       (goto-char (org-table-TBLFM-begin))
-      (setq s (set-marker (make-marker) (point)))
+      (setq s (point-marker))
       (insert (concat formula "\n"))
-      (setq e (set-marker (make-marker) (point)))
+      (setq e (point-marker))
       ;; Recalculate the table
       (beginning-of-line 0)		; move to the inserted line
       (skip-chars-backward " \r\n\t")