Additional line breaks when saving xinha

STEPS:
------

• Edit Articles > myarticle1 in the quickstart
• CTRL+A, Backspace, 1, Return, 2
• Save
• Edit again

EXP:

1
2

ACT:
1

2

With the help of the htmlmode option:

EXP:
<p>1
</p>
<p>2
</p>

ACT:
<p>1
</p>
<p> 
</p>
<p>2
</p>