Re: LOGBOOK drawer now being created with blank line afterwards

[Kris Nelson <Kris@KristoferNelson.com>]

On 2024-05-15 02:38, Rens Oliemans wrote:
> Thanks for reporting, it seems that this was changed in 
> f63ff074417315fcf93c2ca6cfe8f89fcc6d902f, "Fix subtle differences 
> between overlays and invisible text properties", bisected with Emacs 
> 29.3. 

Thanks, that definitely helps narrow it down! Seems to be a result of 
this specific patch in the org-log-beginning function:

diff --git a/lisp/org.el b/lisp/org.el
index 4c87011..953f2f3 100644
--- a/lisp/org.el 
<https://git.savannah.gnu.org/cgit/emacs/org-mode.git/tree/lisp/org.el?id=cd83606cfd8a52e7222a0deeeddb3af29e9cbfce>
+++ b/lisp/org.el 
<https://git.savannah.gnu.org/cgit/emacs/org-mode.git/tree/lisp/org.el?id=f63ff074417315fcf93c2ca6cfe8f89fcc6d902f> 

@@ -10020,13 +10031,19 @@ narrowing."
           (throw 'exit nil))))
         ;; No drawer found.  Create one, if permitted.
         (when create
-         (unless (bolp) (insert "\n"))
-         (let ((beg (point)))
-           (insert ":" drawer ":\n:END:\n")
-           (org-indent-region beg (point))
-           (org-flag-region (line-end-position -1)
-                                (1- (point)) t 'outline))
-         (end-of-line -1)))))
+             ;; Avoid situation when we insert drawer right before
+             ;; first "*".  Otherwise, if the previous heading is
+             ;; folded, we are inserting after visible newline at
+             ;; the end of the fold, thus breaking the fold
+             ;; continuity.
+             (when (org-at-heading-p) (backward-char))
+             (org-fold-core-ignore-modifications
+             (unless (bolp) (insert-and-inherit "\n"))
+           (let ((beg (point)))
+             (insert-and-inherit ":" drawer ":\n:END:\n")
+             (org-indent-region beg (point))
+             (org-fold-region (line-end-position -1) (1- (point)) t (if 
(eq org-fold-core-style 'text-properties) 'drawer 'outline)))))
+       (end-of-line -1))))
        (t
         (org-end-of-meta-data org-log-state-notes-insert-after-drawers)
         (skip-chars-forward " \t\n")

I switched the (when create) section back to the previous state and 
confirmed that when redoing my test scenario no blank line was left 
after the logbook.

In the new code, I attempted just removing the final "\n" from 
(insert-and-inherit ":" drawer ":\n:END:\n") but that resulted in some 
weird behaviour when redoing my tests. I'll keep mucking with this to 
see where I get.

To clarify, would this behaviour change be considered a bug? Or is this 
intentional as a part of that patch, and I just need to figure out how 
to change the behaviour for myself?