paragraph break inside link creates 2 links; deleting paragraph break does not join them.

[Jude Allred]

1. go to ckeditor.com/demo
2. set the 'source' to

   <p>
   	<a href="foo">I am a link</a></p>
   

3. return to wysiwyg mode
4. place the cursor immediately before the 'l' in 'link'
5. press enter
6. press backspace
7. view source

[expected]: The source is relatively unaltered: there's only one link.

[actual] there are two links:

<p>
	<a href="foo">I am a </a><a href="foo">link</a></p>

Some more info: Pressing 'enter' the first time breaks the links apart. I would consider this a bug, but the behavior is somewhat reasonable. Pressing 'backspace' removes the break and the links are now adjacent. The expected behavior here is that the links have rejoined, since the "backspace" logically has undone the action of pressing "enter".