Empty lines are removed in enter mode BR

[Jakub Ś]

To reproduce:

1. Open enterkey sample and set enter mode to BR
2. in WYSIWYG press new page command and then press Enter key few times. You will get:

   <br />
   <br />
   <br />
   

3. Toggle between WYSIWYG and Source

Result: Every time you switch one BR gets removed until there is nothing in editor. This is in CKEditor 4 beta

4. From CKEditor 4.0 you will get something like below when switching to source.

   <br />
   <br />
   <br />
   &nbsp;
   

5. Every time you switch to source remove the  . Only then br tag gets remove (one at a time)

Problem can be reproduced in all browsers from CKEditor 4 beta. It doesn't occur in 3.x branch.

[Jakub Ś]

#10145 was marked as duplicate.