Safari: new paragraph is being added automatically

[Wiktor Walc]

When clicking between two paragraps an empty space is added automatically.

Steps to reproduce

Issue 1

• Open "Replace by Class Name" sample
• Paste the following in source mode:

  <p>
  	This is some <strong>sample text</strong>. You are using <a href="http://ckeditor.com/">CKEditor</a>.</p>
  <p>
  	This is some <strong>sample text</strong>. You are using <a href="http://ckeditor.com/">CKEditor</a>.</p>
  <p>
  	This is some <strong>sample text</strong>. You are using <a href="http://ckeditor.com/">CKEditor</a>.</p>
  

• Click on the second line (for example on "some").
• Result:

An empty paragraph was added to the source:

<p>
	This is some <strong>sample text</strong>. You are using <a href="http://ckeditor.com/">CKEditor</a>.</p>
<p>
	This&nbsp;is some <strong>sample text</strong>. You are using <a href="http://ckeditor.com/">CKEditor</a>.</p>
<p>
	&nbsp;</p>
<p>
	This is some <strong>sample text</strong>. You are using <a href="http://ckeditor.com/">CKEditor</a>.</p>

Issue 2

If you follow the steps above, but click between "This" and "is" in the second paragraph, an empty space is replaced with " ". It seems to be related and caused by the same bug.

Looks like a regression, cannot reproduce it in 3.4.1.