style(src): Reformat all Haskell source files

Data/Git.hs

Data/Git/Config.hs

Data/Git/Delta.hs

Data/Git/Diff.hs

Data/Git/Diff/Patience.hs

Data/Git/Imports.hs

Data/Git/Index.hs

Data/Git/Internal.hs

Data/Git/Monad.hs

Data/Git/Named.hs

Data/Git/OS.hs

Data/Git/Parser.hs

Data/Git/Path.hs

Data/Git/Ref.hs

Data/Git/Repository.hs

Data/Git/Revision.hs

Data/Git/Storage.hs

Data/Git/Storage/CacheFile.hs

Data/Git/Storage/FileReader.hs

Data/Git/Storage/FileWriter.hs