Update PrettyPrint.hs

Cabal/Distribution/PackageDescription/PrettyPrint.hs

@@ -126,13 +126,8 @@ ppCondTree2 v grammar = go
         thenDoc = go thenTree
 
     ppIf (CondBranch c thenTree (Just elseTree)) =
-          case (False, False) of
- --       case (isEmpty thenDoc, isEmpty elseDoc) of
-              (True,  True)  -> mempty
-              (False, True)  -> [ ppIfCondition c thenDoc ]
-              (True,  False) -> [ ppIfCondition (cNot c) elseDoc ]
-              (False, False) -> [ ppIfCondition c thenDoc
-                                , PrettySection () "else" [] elseDoc
+        [ ppIfCondition c thenDoc
+        , PrettySection () "else" [] elseDoc
                                 ]
       where
         thenDoc = go thenTree