[GHC] #5964: Documentation: DatatypeContexts is NOT on by default in 7.4.1

[GHC]

#5964: Documentation: DatatypeContexts is NOT on by default in 7.4.1
------------------------------+---------------------------------------------
 Reporter:  dagit             |          Owner:                  
     Type:  bug               |         Status:  new             
 Priority:  normal            |      Component:  Documentation   
  Version:  7.4.1             |       Keywords:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
  Failure:  None/Unknown      |       Testcase:                  
Blockedby:                    |       Blocking:                  
  Related:                    |  
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 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 =>
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5964>
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