Backport commit 331573e40 from Emacs

* lisp/org-element.el (org-element-copy-buffer):
Repair incorrect escaping.
* lisp/org-macs.el (org--line-empty-p): Fix broken skip-set.
* lisp/org.el (org-setup-yank-dnd-handlers): Fix broken regexp.

Org: fix mistakes in regexp, skip set and doc string
331573e40731d6635acd366694493c26b480c230
Mattias Engdegård
Mon Jun 10 14:07:07 2024 +0200

lisp/org-element.el

@@ -648,7 +648,7 @@ IMPORTANT: The buffer copy may also have variable `buffer-file-name'
 copied.
 
 To prevent Emacs overwriting the original buffer file,
-`write-contents-functions' is set to \='(always).  Do not alter this
+`write-contents-functions' is set to \\='(always).  Do not alter this
 variable and do not do anything that might alter it (like calling a
 major mode) to prevent data corruption.  Also, do note that Emacs may
 jump into the created buffer if the original file buffer is closed and

lisp/org-macs.el

@@ -815,7 +815,7 @@ Match at beginning of line when WITH-BOL is non-nil."
   (and (not (bobp))
        (save-excursion
 	 (forward-line n)
-         (skip-chars-forward "[ \t]")
+         (skip-chars-forward " \t")
          (eolp))))
 
 (defun org-previous-line-empty-p ()

lisp/org.el

@@ -20749,7 +20749,7 @@ it has a `diary' type."
     (yank-media-handler "image/.*" #'org--image-yank-media-handler)
     ;; Looks like different DEs go for different handler names,
     ;; https://larsee.com/blog/2019/05/clipboard-files/.
-    (yank-media-handler "x/special-\\(?:gnome\|KDE\|mate\\)-files"
+    (yank-media-handler "x/special-\\(?:gnome\\|KDE\\|mate\\)-files"
                         #'org--copied-files-yank-media-handler))
   (when (boundp 'x-dnd-direct-save-function)
     (setq-local x-dnd-direct-save-function #'org--dnd-xds-function)))