Changes to ghc

Changes to ghc:
commit 2f8d5e28929649c0c4fb0e48c78ec63a7ae625ab
Author: Shachaf Ben-Kiki <shachaf@gmail.com>
Date:   Thu Jul 10 23:55:53 2014 -0500

    Fix typos in base documentation.

    Summary: Signed-off-by: Shachaf Ben-Kiki <shachaf@gmail.com>

    Test Plan: n/a

    Reviewers: austin

    Reviewed By: austin

    Subscribers: simonmar, relrod, carter

    Differential Revision: https://phabricator.haskell.org/D57