In Org buffer, you can comment code within source blocks. This opens
a new buffer, insert the code there, comment it, and insert the buffer
contents back into Org's buffer.
With the current `comment-region' function, point is lost when Org
goes back to the org buffer. Using `save-window-excursion' instead
of `save-excursion' fixes the problem.
Are you aware of problems that this change may trigger?
I cannot think of any, but I'm always a bit cautious when using
`save-window-excursion'.
Thanks for your feedback,