[Haskell-cafe] wordsBy in the base libraries?

[Maxime Henrion]

This got a bit mangled, here's the fixed version:

> > wordsBy :: (a -> Bool) -> [a] -> [[a]]
> > wordsBy p s = case dropWhile p s of
> >   []      -> []
> >   s':rest -> (s':w) : wordsBy p s''
> >     where (w, s'') = break p rest