ghc: Miscellaneous updates and clean up

ghc/.ghc/ghci.conf

@@ -1,22 +1,33 @@
 -- -------------------------------------------------------------------- --
 -- Default Extensions
+-- https://ghc.gitlab.haskell.org/ghc/doc/users_guide/exts/control.html
+-- GHC2024 gives errors with various projects
 
-:set -XRankNTypes
-:set -XGADTs
-:set -XTypeFamilies
-:set -XTypeApplications
 :set -XBangPatterns
+:set -XConstraintKinds
+:set -XDataKinds
+:set -XDuplicateRecordFields
+:set -XFlexibleContexts
+:set -XGADTs
 :set -XMagicHash
 :set -XMultiParamTypeClasses
-:set -XPatternSynonyms
-:set -XDataKinds
-:set -XConstraintKinds
-:set -XOverloadedStrings
 :set -XNumericUnderscores
-:set -XFlexibleContexts
-:set -XScopedTypeVariables
 :set -XOverloadedRecordDot
-:set -XDuplicateRecordFields
+:set -XOverloadedStrings
+:set -XPatternSynonyms
+:set -XRankNTypes
+:set -XScopedTypeVariables
+:set -XTypeApplications
+
+-- -------------------------------------------------------------------- --
+-- Useful flags
+
+:set -fprint-explicit-foralls
+:set -fprint-explicit-kinds
+:set -ferror-spans
+-- Enable multi-line expressions with :{ and :}
+:set +m
+-- Colorizing and pretty-printing ghci output
 :set -interactive-print=Text.Pretty.Simple.pPrint
 
 -- -------------------------------------------------------------------- --
@@ -42,7 +53,8 @@
 -- -------------------------------------------------------------------- --
 -- Util cmds
 
+:def fzf const . pure $ ":! cat $HOME/.ghc/ghci_history | fzf --height 25"
 :def hlint const . return $ ":! hlint \"src\""
 :def hoogle \s -> return $ ":! hoogle --color --count=15 " ++ show s
 :def rg \s -> return $ ":! rg " ++ s
-:def fzf const . pure $ ":! cat $HOME/.ghc/ghci_history | fzf --height 25"
+:def tags \_ -> return ":! fast-tags --fully-qualified -R ."