Implied GHC extensions (in HEAD)

Hi devs, when compiling a snippet of code (which I have written using GHC HEAD) with GHC 7.10.2 (from the platform) I got errors about missing extension pragmas. I had to add two:

{-# LANGUAGE ViewPatterns, KindSignatures, GADTs, PolyKinds, StandaloneDeriving, FlexibleContexts, FlexibleInstances, ScopedTypeVariables, TypeFamilies, PatternSynonyms, FunctionalDependencies, RankNTypes, UndecidableInstances #-} {-# LANGUAGE DataKinds, TypeOperators #-} -- 7.10??

Looks like the implications have been extended in 7.11. I guess PolyKinds now implies DataKinds, but cannot think of what implies TypeOperators. Was this change by design or by accident? Any ideas? Cheers, Gabor