[BUG] inserting notes at end

[Tor Kringeland <tor.kringeland@ntnu.no>]

If our Org file is

#+begin_example
* a heading

text<POINT>
#+end_example

And we insert an empty note, we get

#+begin_example
* a heading

- Note taken on [2022-07-26 Tue 16:10]
text
#+end_example

instead of the expected

#+begin_example
* a heading
- Note taken on [2022-07-26 Tue 16:10]

text
#+end_example

If POINT is at the heading or the line below, behavior is as expected.
If a note has already been inserted correctly before (as in the third
snippet), then subsequent notes are insert corrected as well, regardless
of POINT.  Conversely, if one first is inserted wrongly, then subsequent
will also be inserted wrongly.