CloneContents selects whole element when selection starts at the start of that element

[mlewand]

Are you reporting a feature or a bug?

Bug

Check if the issue is already reported

http://dev.ckeditor.com/ticket/17030

Provide detailed reproduction steps (if any)

1. Put attached sample into ckeditor/samples folder
2. Open browser console
3. Select e.g. [sample te]xt. It is important that selection starts at the beginning of the element. If you select e.g. sam[ple te]xt it will work as expected
4. Inspect documentFragment in console

Expected result

Text should contain sample te

Actual result

Text contains sample text

Other details

Problem can be reproduced from CKEditor 4.5.0 in all browsers.