[Haskell-cafe] version information in the documentation

[Manlio Perillo]

Hi.

I'm reading the GHC documentation, in detail:
http://www.haskell.org/ghc/docs/latest/html/users_guide/syntax-extns.html

I have noted that there is no indication about the GHC version where an 
extension has been first implemented.


The same with the documentation from the libraries.

I think that this is an important information, and should be added.



Thanks  Manlio Perillo