change of strictness in zipWith

[Henning Thielemann]

On Fri, 2 Jan 2015, Roman Cheplyaka wrote:

> This is a big deal. That's a very common pattern.

However, I checked the Haskell 98 report (chapter 8, standard Prelude, 
PreludeList, page 120 in the PDF) and found that the new behaviour matches 
the specified one:

zipWith :: (a -> b -> c) -> [a] -> [b] -> [c]
zipWith z (a:as) (b:bs) = z a b : zipWith z as bs
zipWith _ _ _ = []