From 1be0f0fba8d860b960e79442a891fce6b1aca192 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Wed, 7 Oct 2020 23:03:14 -0700
Subject: Use double quotes for YAML metadata.

Closes #6727.
---
 src/Text/Pandoc/Writers/Markdown.hs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/Text/Pandoc')

diff --git a/src/Text/Pandoc/Writers/Markdown.hs b/src/Text/Pandoc/Writers/Markdown.hs
index f0643c91b..cddc57850 100644
--- a/src/Text/Pandoc/Writers/Markdown.hs
+++ b/src/Text/Pandoc/Writers/Markdown.hs
@@ -180,7 +180,7 @@ valToYaml (SimpleVal x)
       if hasNewlines x
          then hang 0 ("|" <> cr) x
          else if any hasPunct x
-           then "'" <> fmap escapeSingleQuotes x <> "'"
+           then "\"" <> fmap escapeInDoubleQuotes x <> "\""
            else x
     where
       hasNewlines NewLine = True
@@ -192,7 +192,7 @@ valToYaml (SimpleVal x)
       isYamlPunct = (`elem` ['-','?',':',',','[',']','{','}',
                              '#','&','*','!','|','>','\'','"',
                              '%','@','`',',','[',']','{','}'])
-      escapeSingleQuotes = T.replace "'" "''"
+      escapeInDoubleQuotes = T.replace "\"" "\\\"" . T.replace "\\" "\\\\"
 valToYaml _ = empty
 
 -- | Return markdown representation of document.
-- 
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