samdg on "File modified - w3-total-cache/readme.txt?"

Wordfence gave me an alert a few hours ago that the file has been modified.

The modification is shown in this line, here:

From Tested up to: 3.7.1 it has now become Tested up to: 3.5.1

Is it hacked or something? '

http://wordpress.org/plugins/w3-total-cache/