Hi all,
here is a patch that fixes outline visibility saving.
The root issue I've found is that when you call org-babel-execute-subtree on a folded outline, the result is shown visible so the visibility property is not well kept.
The root cause is the markers used by org-outline-overlay-data to bound the invisible area.
When org-babel-insert-result is called by org-babel-execute-subtree, text is added from the position of marker that mark the end of invisible area.
As the insertion-type of the marker is by default nil, the marker stays where it is but text is inserted after, so the inserted text becomes visible.
I'm not sure about the fix, I'm fearing some side effect I can't see in my usage so it's open to any comments
Thanks
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Sylvain
0001-Fix-org-outline-overlay-data-marker-insertion-type.patch