Base: Don't reexport Data.Char

It's really not used often enough to warrant special treatment

src/Base.hs

@@ -3,7 +3,6 @@ module Base (
     module Control.Applicative,
     module Control.Monad.Extra,
     module Control.Monad.Reader,
-    module Data.Char,
     module Data.Function,
     module Data.List,
     module Data.Maybe,
@@ -34,7 +33,6 @@ module Base (
 import Control.Applicative
 import Control.Monad.Extra
 import Control.Monad.Reader
-import Data.Char
 import Data.Function
 import Data.List
 import Data.Maybe

src/Oracles/WindowsRoot.hs

 {-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
 module Oracles.WindowsRoot (windowsRoot, windowsRootOracle) where
 
+import Data.Char (isSpace)
 import Base
 
 newtype WindowsRoot = WindowsRoot ()

src/Rules/Library.hs

 module Rules.Library (buildPackageLibrary, cSources, hSources) where
 
+import Data.Char
+
 import Expression hiding (splitPath)
 import GHC
 import Oracles

src/Rules/Program.hs

 module Rules.Program (buildProgram) where
 
+import Data.Char
+
 import Expression hiding (splitPath)
 import GHC hiding (ghci)
 import Oracles