FireFox deleting last character from a line deletes the EOL rather than the character

[Jude Allred]

1. go to ckeditor.com/demo

2. set the article source to:

   <pre>
   aaaa
   &nbsp; bbbb
   &nbsp; cccc
   &nbsp; dddd
   eeee
   </pre>
   

(There are several other configurations (some not invloving  's) which also cause this bug. This is the most consistently reproducible.)

3. in wysiwyg mode, place the cursor at the end of line cccc

4. press backspace

Expected: A C was deleted. The source now looks like this:

<pre>
aaaa
&nbsp; bbbb
&nbsp; ccc
&nbsp; dddd
eeee
</pre>

Actual: a line ending was deleted. The source now looks like this:

<pre>
aaaa
&nbsp; bbbb
&nbsp; cccc&nbsp; dddd
eeee
</pre>

[Krzysztof Studnik]

Confirmed on Firefox 3.6.10

[Marek Lewandowski]

This issue is not reproducible anymore (checked with CKEditor 4.4.3 and FireFox 31).