[O] [PATCH] * lisp/org-src.el (org-edit-src-exit): disable undo.

[Aaron Ecay]

Currently, this function modifies the buffer-undo-list, which it should
not.  One can reproduce the undesirable behavior by creating a new org
buffer and manually typing in the following text:

#+begin_src emacs-lisp
  foo
  bar
#+end_src

Then press C-c ' twice to enter and exit the edit-src.  Then press C-/
to undo: the cursor moves to the beginning of the source block.  Further
presses of C-/ undo the original text entry (as expected).
---
 lisp/org-src.el | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/lisp/org-src.el b/lisp/org-src.el
index 81c0054..73e0751 100644
--- a/lisp/org-src.el
+++ b/lisp/org-src.el
@@ -737,11 +737,12 @@ with \",*\", \",#+\", \",,*\" and \",,#+\"."
       (kill-buffer buffer))
     (goto-char beg)
     (when allow-write-back-p
-      (delete-region beg (max beg end))
-      (unless (string-match "\\`[ \t]*\\'" code)
-       (insert code))
-      (goto-char beg)
-      (if single (just-one-space)))
+      (let ((buffer-undo-list t))
+       (delete-region beg (max beg end))
+       (unless (string-match "\\`[ \t]*\\'" code)
+         (insert code))
+       (goto-char beg)
+       (if single (just-one-space))))
     (if (memq t (mapcar (lambda (overlay)
                          (eq (overlay-get overlay 'invisible)
                              'org-hide-block))
-- 
1.8.1.5