Hi Epic,
I will post here all my news feedbacks 2015 about the documention .
Unreal Engine 4.7 Release isn’t a 2015 builds ?
https://docs.unrealengine.com/latest/INT/Support/Builds/index.html
Thank
Oh didn’t you hear? It was a long read (The release notes) but near the bottom there was the time travelling feature in which Epic sent it back to 2014. Thanks to them messing around with the world-lines & Space-time continium, You’ve actually been using 4.7 since October, But your memories have passed over from another world-line 
In all seriousness, I guess it was typo / mistake :>