setReadOnly does the reverse of what it says it does

[Joe]

Descriptive summary :

According to ​http://ckeditor.com/blog/CKEditor_3.6_released , editor.setReadOnly( true ) should turn Read Only mode on, while editor.setReadOnly( false ) sould turn Read Only mode off. In practice, its switched.

Steps to reproduce :

1. Go to ​http://nightly.ckeditor.com/6956/_samples/readonly.html in Chrome
2. Right click inspect to get to your console window
3. In the console, type: editor.setReadOnly( true )
4. Verify that the editor is not in read only mode
5. In the console, type: editor.setReadOnly( false )
6. Verify that the editor is in read only mode

Browser name and OS :

Chrome, Windows XP

Screenshot :

[Frederico Caldeira Knabben]

DUP of #7914.