From 24191a2a278c0dec30bacd66b78cbb8cc8d91324 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Mon, 15 Mar 2021 10:37:35 -0700
Subject: Use foldl' instead of foldl everywhere.

---
 src/Text/Pandoc/Lua/Filter.hs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/Text/Pandoc/Lua')

diff --git a/src/Text/Pandoc/Lua/Filter.hs b/src/Text/Pandoc/Lua/Filter.hs
index bffe01a34..90967f295 100644
--- a/src/Text/Pandoc/Lua/Filter.hs
+++ b/src/Text/Pandoc/Lua/Filter.hs
@@ -22,6 +22,7 @@ import Control.Monad.Catch (finally, try)
 import Data.Data (Data, DataType, dataTypeConstrs, dataTypeName, dataTypeOf,
                   showConstr, toConstr, tyconUQname)
 import Data.Foldable (foldrM)
+import Data.List (foldl')
 import Data.Map (Map)
 import Data.Maybe (fromMaybe)
 import Foreign.Lua (Lua, Peekable, Pushable, StackIndex)
@@ -204,7 +205,7 @@ walkMeta lf (Pandoc m bs) = do
 
 walkPandoc :: LuaFilter -> Pandoc -> Lua Pandoc
 walkPandoc (LuaFilter fnMap) =
-  case foldl mplus Nothing (map (`Map.lookup` fnMap) pandocFilterNames) of
+  case foldl' mplus Nothing (map (`Map.lookup` fnMap) pandocFilterNames) of
     Just fn -> \x -> runFilterFunction fn x *> singleElement x
     Nothing -> return
 
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