From cd460ec9c75f6f971125b75f9c3214a693ba651b Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Wed, 28 Feb 2024 11:27:34 -0800
Subject: Fix regression in section numbering.

Starting with pandoc 3.1.12, unnumbered sections incremented
the section number.

Closes #9516.
---
 src/Text/Pandoc/Shared.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/Text/Pandoc/Shared.hs b/src/Text/Pandoc/Shared.hs
index 0c58ad9fe..7318f2e86 100644
--- a/src/Text/Pandoc/Shared.hs
+++ b/src/Text/Pandoc/Shared.hs
@@ -529,7 +529,7 @@ makeSections numbering mbBaseLevel bs =
           | otherwise = 0
     let newnum = zipWith adjustNum [minLevel..level]
                     (lastnum ++ repeat 0)
-    unless (null newnum) $ S.put newnum
+    unless (null newnum || "unnumbered" `elem` classes) $ S.put newnum
     let (sectionContents, rest) = break (headerLtEq level) xs
     sectionContents' <- go sectionContents
     rest' <- go rest
-- 
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