Suggest LANGUAGE pragmas instead of -XFoo

Minor, but still: Currently GHC says:

readFail037.hs:4:1:
    Too many parameters for class ‛Foo’
    (Use -XMultiParamTypeClasses to allow multi-parameter classes)
    In the class declaration for ‛Foo’

Maybe it is just me, but generally I find LANGUAGE pragmas are the way to go. So I think it should read

readFail037.hs:4:1:
    Too many parameters for class ‛Foo’
    (Use {-# LANGUAGE MultiParamTypeClasses #-} to allow multi-parameter classes)
    In the class declaration for ‛Foo’

Note that it is easier to copying MultiParamTypeClasses (by double-clicking), entering "-X", and pasting, than copying XMultiParamTypeClasses and removing the X again.

If noone complains or someone says that it is a good idea I’ll fix it myself.

Trac metadata

Trac field	Value
Version	7.6.3
Type	FeatureRequest
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture