Vladislav Zavialov authored Dec 12, 2023 and Marge Bot committed Dec 13, 2023

Summary of changes

* Remove Language.Haskell.Syntax.Concrete
* Move all tokens into GhcPs extension fields (LHsToken -> EpToken)
* Create new TTG extension fields as needed
* Drop the MultAnn wrapper

Updates the haddock submodule.

Co-authored-by: Alan Zimmerman <alan.zimm@gmail.com>