Data.Tuple impoverished

[Henning Thielemann]

On Fri, 15 Jun 2012, Twan van Laarhoven wrote:

> I am strongly in favor of adding these functions to Data.Tuple, there is no 
> good reason for them not to be there. I would also support in addition to 
> mapTriple, mapFst3, etc.

I can just add them to Data.Tuple.HT. Then you can use them immediately 
and even more, people do not need to upgrade GHC in order to use packages 
that call the new functions.