LaTeX writer: add braces around comments in title-meta.

This is needed to prevent PDFs from interpreting this as a
sequence of titles.

See #10501.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/Text/Pandoc/Writers/LaTeX.hs b/src/Text/Pandoc/Writers/LaTeX.hs
index 9f5f6ed69..2c71e689a 100644
--- a/src/Text/Pandoc/Writers/LaTeX.hs
+++ b/src/Text/Pandoc/Writers/LaTeX.hs
@@ -179,7 +179,8 @@ pandocToLaTeX options (Pandoc meta blocks) = do
   main <- blockListToLaTeX blocks'''
   biblioTitle <- inlineListToLaTeX lastHeader
   st <- get
-  titleMeta <- stringToLaTeX TextString $ stringify $ docTitle meta
+  titleMeta <- escapeCommas <$> -- see #10501
+                stringToLaTeX TextString (stringify $ docTitle meta)
   authorsMeta <- mapM (stringToLaTeX TextString . stringify) $ docAuthors meta
   -- The trailer ID is as hash used to identify the PDF. Taking control of its
   -- value is important when aiming for reproducible PDF generation. Setting
@@ -301,6 +302,10 @@ pandocToLaTeX options (Pandoc meta blocks) = do
        Nothing  -> main
        Just tpl -> renderTemplate tpl context'
 
+-- Commas in title-meta need to be put in braces; see #10501
+escapeCommas :: Text -> Text
+escapeCommas = T.replace "," "{,}"
+
 toSlides :: PandocMonad m => [Block] -> LW m [Block]
 toSlides bs = do
   opts <- gets stOptions