Revert "Remove redundant imports."

This reverts commit ea5045602a.

src/Turtle/Format.hs

@@ -67,6 +67,7 @@ import Control.Category (Category(..))
 import Data.Monoid ((<>))
 import Data.String (IsString(..))
 import Data.Text (Text, pack)
+import Data.Word (Word)
 import Filesystem.Path.CurrentOS (FilePath, toText)
 import Numeric (showEFloat, showFFloat, showGFloat, showHex, showOct)
 import Prelude hiding ((.), id, FilePath)

src/Turtle/Pattern.hs

@@ -105,7 +105,7 @@ import Control.Monad.Trans.Class (lift)
 import Control.Monad.Trans.State
 import Data.Char
 import Data.List (foldl')
-import Data.Monoid ((<>))
+import Data.Monoid (Monoid(..), (<>))
 import Data.String (IsString(..))
 import Data.Text (Text)
 import qualified Data.Text as Text

src/Turtle/Shell.hs

@@ -68,13 +68,13 @@ module Turtle.Shell (
     , using
     ) where
 
-import Control.Applicative (Alternative(..), liftA2)
+import Control.Applicative (Applicative(..), Alternative(..), liftA2)
 import Control.Monad (MonadPlus(..), ap)
 import Control.Monad.IO.Class (MonadIO(..))
 import Control.Monad.Managed (Managed, with)
 import Control.Foldl (Fold(..), FoldM(..))
 import qualified Control.Foldl as Foldl
-import Data.Monoid ((<>))
+import Data.Monoid (Monoid(..), (<>))
 import Data.String (IsString(..))
 
 -- | A @(Shell a)@ is a protected stream of @a@'s with side effects