Cabal revisions of hindent-4.5.6

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 name:                hindent version:             4.5.6+x-revision: 1 synopsis:            Extensible Haskell pretty printer description:         Extensible Haskell pretty printer. Both a library and an executable.                      .                    , data-default                    , haskell-src-exts == 1.16.*                    , monad-loops-                   , mtl+                   , mtl < 2.3                    , text                    , transformers                     , data-default                    , haskell-src-exts == 1.16.*                    , monad-loops-                   , mtl+                   , mtl < 2.3                    , text                    , hspec                    , directory