Typo in Data.Either

[roconnor at theorem.ca]

The Haddocks for the Applicative instance for (Either e) says since 3.0, 
but AFAICT it should be since 4.3.0.0.

-- 
Russell O'Connor                                      <http://r6.ca/>
``All talk about `theft,''' the general counsel of the American Graphophone
Company wrote, ``is the merest claptrap, for there exists no property in
ideas musical, literary or artistic, except as defined by statute.''