Documentation: DatatypeContexts is NOT on by default in 7.4.1

This page: http://www.haskell.org/ghc/docs/7.4.1/html/users_guide/data-type-extensions.html

Claims that data type contexts are on by default, but this does not seem to be the case.

For example:

$ ghci
GHCi, version 7.4.1: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Prelude> data (Functor f) => Blah f = Blah f

<interactive>:2:6:
    Illegal datatype context (use -XDatatypeContexts): Functor f =>

Trac metadata

Trac field	Value
Version	7.4.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Documentation
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