Can I prevent an empty line at the end of a plain list item from showing when the item is folded? For example, if I have

+ top

  wooden pole.  fireworks.

+ bottom

can I have it fold into

+ top...
+ botton

instead of

+ top...

+ bottom

The function org-list-get-item-end-before-blank excludes the trailing newlines from list items.

The replacement my-org-list-get-item-end-before-blank in the following code avoids that if there are subsequent list items in the same list.

Function org-list-get-item-end-before-blank is used at quite a few places in orgmode. It seems better to me to keep the modification of org-list-get-item-end-before-blank local to org-cycle-internal-local which controls the visibility of items. Therefore the code below does not globally override org-list-get-item-end-before-blank with my-org-list-get-item-end-before-blank via advice-add but overrides org-list-get-item-end-before-blank locally in an :around-advice for org-cycle-internal-local.

(defun my-org-list-get-item-end-before-blank (item struct)
  "Override advice for `org-list-get-item-end-before-blank'.
Avoid skipping backwards empty lines if we are not at the end of the list."
    (goto-char (org-list-get-item-end item struct))
    (if (org-list-get-next-item item struct (org-list-prevs-alist struct))
        (forward-line -1)
      (skip-chars-backward " \r\t\n"))

(defun ad-org-list-set-item-visibility (oldfun &rest args)
  "Hide empty lines at the end of plain list items.
Around advcie for `org-list-set-item-visibility'
temporarily modifying `org-list-get-item-end-before-blank'
with `my-org-list-get-item-end-before-blank' which see."
  (cl-letf (((symbol-function 'org-list-get-item-end-before-blank)
    (apply oldfun args)))

(advice-add 'org-cycle-internal-local :around #'ad-org-list-set-item-visibility)
(advice-add 'org-list-set-item-visibility :around #'ad-org-list-set-item-visibility)
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