formatting updates

- remove trailing whitespaces
- `bool` is already in `base` since 4.7.0.0 (ghc 7.8.1) https://hackage.haskell.org/package/base/docs/src/Data.Bool.html#bool

lets-lens.cabal

@@ -4,8 +4,8 @@ license:              BSD3
 license-file:         LICENCE
 author:               Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
 maintainer:           Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
-copyright:            Copyright (C) 2015-2016 National ICT Australia Limited
-copyright:            Copyright (c) 2017-2018, Commonwealth Scientific and Industrial Research Organisation (CSIRO) ABN 41 687 119 230.
+copyright:            Copyright (C) 2015-2016 National ICT Australia Limited,
+                      Copyright (c) 2017-2018, Commonwealth Scientific and Industrial Research Organisation (CSIRO) ABN 41 687 119 230.
 synopsis:             Source code for exercises on the lens concept
 category:             Education
 description:          Source code for exercises on the lens concept

src/Lets/Data.hs

@@ -16,7 +16,6 @@ module Lets.Data (
 , Identity(..)
 , AlongsideLeft(..)
 , AlongsideRight(..)
-, bool
 ) where
 
 import Control.Applicative(Applicative(..))
@@ -179,15 +178,3 @@ data AlongsideRight f a b =
 instance Functor f => Functor (AlongsideRight f a) where
   fmap f (AlongsideRight x) =
     AlongsideRight (fmap (\(a, b) -> (a, f b)) x)
-
-----
-
-bool ::
-  a
-  -> a
-  -> Bool
-  -> a
-bool f _ False =
-  f
-bool _ t True =
-  t

src/Lets/GetSetLens.hs

@@ -7,6 +7,7 @@ module Lets.GetSetLens (
 , set
 , modify
 , (%~)
+, (.~)
 , fmodify
 , (|=)
 , fstL

src/Lets/OpticPolyLens.hs

@@ -9,6 +9,7 @@ module Lets.OpticPolyLens (
 , set
 , modify
 , (%~)
+, (.~)
 , fmodify
 , (|=)
 , fstL

src/Lets/StoreLens.hs

@@ -14,6 +14,7 @@ module Lets.StoreLens (
 , set
 , modify
 , (%~)
+, (.~)
 , fmodify
 , (|=)
 , fstL
@@ -28,6 +29,7 @@ module Lets.StoreLens (
 , choice
 , (|||)
 , cityL
+, stateL
 , countryL
 , streetL
 , suburbL
@@ -51,7 +53,7 @@ import Data.Map(Map)
 import qualified Data.Map as Map(insert, delete, lookup)
 import Data.Set(Set)
 import qualified Data.Set as Set(insert, delete, member)
-import Lets.Data(Store(Store), Person(Person), Locality(Locality), Address(Address), bool)
+import Lets.Data(Store(Store), Person(Person), Locality(Locality), Address(Address))
 import Prelude hiding (product)
 
 -- $setup