Differences are done in the wrong order when using the history page

Imagine the following: you add a new word to a page. Then you go in the history view and you check the difference with the previous version. You'll see in the diff that your new word is displayed in red and striked out. It should be displayed in green as something new instead and not striked out.

This is because the "From" and "To" columns in the History page are in the wrong order. They should be swapped.