Hello,

I've been testing out org-babel-examplify-region in my bookshelf file to 
mark excerpts from books, but there's an issue I have encountered. If 
there is a #+end_example after the currently marked region, once you run 
org-babel-examplify-region, it does not create a #+end_example at the 
end of the marked region properly unless the last line marked includes 
the line end. An example is below:

    This is text,
    that is marked.

    #+begin_example
    This is text,
    already within an example block
    #+end_example

Marking this text:

    This is text,
    that is marked.

And running org-babel-examplify-region on the marked region results in:

    #+begin_example
    This is text,
    that is marked.#+end_example

    #+begin_example
    This is text,
    already within an example block
    #+end_example

Which is not a valid example block. I haven't checked the code itself, 
but I can assume from its behavior that it does not create a new line to 
place the example block end onto. Behavior for better usability would be 
to place it onto a new line if other text is present on the same line as 
the marked region end. E.g.

    #+begin_example
    This is text,
    that is marked.
    #+end_example

    #+begin_example
    This is text,
    already within an example block
    #+end_example

Alternatively, it could also just make an assumption and always place it 
onto a new line, but that'd hurt intuitive usability.

Regardless, I think something should be done to fix this, but I'm not 
sure if I'm supposed to categorize this as a [BUG] so I've marked the 
subject as a [FR] instead.

Regards,
Kristoffer