From 8c91fed6a96ef33c919c50fa5115b65a56f5b1d6 Mon Sep 17 00:00:00 2001
From: Matthew Pickering <matthewtpickering@gmail.com>
Date: Wed, 15 Dec 2021 11:51:28 +0000
Subject: Expand documentation for MulArrowT constructor

Fixes #20812
---
 libraries/template-haskell/Language/Haskell/TH/Syntax.hs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libraries/template-haskell/Language/Haskell/TH/Syntax.hs b/libraries/template-haskell/Language/Haskell/TH/Syntax.hs
index 6991d77227..fd03edb872 100644
--- a/libraries/template-haskell/Language/Haskell/TH/Syntax.hs
+++ b/libraries/template-haskell/Language/Haskell/TH/Syntax.hs
@@ -2648,7 +2648,9 @@ data Type = ForallT [TyVarBndr Specificity] Cxt Type -- ^ @forall \<vars\>. \<ct
           | UnboxedTupleT Int              -- ^ @(\#,\#), (\#,,\#), etc.@
           | UnboxedSumT SumArity           -- ^ @(\#|\#), (\#||\#), etc.@
           | ArrowT                         -- ^ @->@
-          | MulArrowT                      -- ^ @FUN@
+          | MulArrowT                      -- ^ @%n ->@
+                                           --
+                                           -- Generalised arrow type with multiplicity argument
           | EqualityT                      -- ^ @~@
           | ListT                          -- ^ @[]@
           | PromotedTupleT Int             -- ^ @'(), '(,), '(,,), etc.@
-- 
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