Rodrigo Mesquita authored May 17, 2022 and Marge Bot committed Jul 03, 2022

Move the GHC-independent definitions from GHC.Hs.ImpExp to
Language.Haskell.Syntax.ImpExp with the required TTG extension fields
such as to keep the AST independent from GHC.

This is progress towards having the haskell-syntax package, as described
in #21592

Bumps haddock submodule