Paste plain text from dialog result incorrect in IE

[garry.yao]

Environment

All IE versions

Reproducing Procedures

1. Open any sample page, click on 'New Page' to clear out document;
2. Click on 'Paste as Plain Text' command and deny clipboard security dialog to force open dialog.
3. Paste the following contents into the dialog, and click 'Ok'.

    Line1
   
    Line2
   

• Actual Result:

   <p>Line2Line1</p>
  

• Expected Result:

   <p>Line1</p>
   <p>Line2</p>
  

[garry.yao]

Fixed with [4823].