From 5ae7014a54984c194f103d406f9fbdbafb277885 Mon Sep 17 00:00:00 2001
From: Simeon Simeonov
Date: Mon, 2 Mar 2026 05:49:35 +0100
Subject: Upgrade markdown-mode

---
 .emacs.d/lisp/markdown-mode.el | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/.emacs.d/lisp/markdown-mode.el b/.emacs.d/lisp/markdown-mode.el
index ddeaf7b..160975c 100644
--- a/.emacs.d/lisp/markdown-mode.el
+++ b/.emacs.d/lisp/markdown-mode.el
@@ -847,9 +847,9 @@ Groups 1 and 3 match the opening and closing tags.
 Group 2 matches the key sequence.")
 
 (defconst markdown-regex-gfm-code-block-open
-  "^[[:blank:]]*\\(?1:```\\)\\(?2:[[:blank:]]*{?[[:blank:]]*\\)\\(?3:[^`[:space:]]+?\\)?\\(?:[[:blank:]]+\\(?4:.+?\\)\\)?\\(?5:[[:blank:]]*}?[[:blank:]]*\\)$"
+  "^[[:blank:]]*\\(?1:`\\{3,\\}\\)\\(?2:[[:blank:]]*{?[[:blank:]]*\\)\\(?3:[^`[:space:]]+?\\)?\\(?:[[:blank:]]+\\(?4:.+?\\)\\)?\\(?5:[[:blank:]]*}?[[:blank:]]*\\)$"
   "Regular expression matching opening of GFM code blocks.
-Group 1 matches the opening three backquotes and any following whitespace.
+Group 1 matches the opening three or more backquotes.
 Group 2 matches the opening brace (optional) and surrounding whitespace.
 Group 3 matches the language identifier (optional).
 Group 4 matches the info string (optional).
@@ -857,9 +857,9 @@ Group 5 matches the closing brace (optional), whitespace, and newline.
 Groups need to agree with `markdown-regex-tilde-fence-begin'.")
 
 (defconst markdown-regex-gfm-code-block-close
-  "^[[:blank:]]*\\(?1:```\\)\\(?2:\\s *?\\)$"
+  "^[[:blank:]]*\\(?1:`\\{3,\\}\\)\\(?2:\\s *?\\)$"
   "Regular expression matching closing of GFM code blocks.
-Group 1 matches the closing three backquotes.
+Group 1 matches the closing three or more backquotes.
 Group 2 matches any whitespace and the final newline.")
 
 (defconst markdown-regex-pre
@@ -1008,6 +1008,13 @@ Group 3 matches the mathematical expression contained within.
 Group 2 matches the opening slashes, and is used internally to
 match the closing slashes.")
 
+(defsubst markdown-make-gfm-fence-regex (num-backticks &optional end-of-line)
+  "Return regexp matching a GFM code fence at least NUM-BACKTICKS long.
+END-OF-LINE is the regexp construct to indicate end of line; $ if
+missing."
+  (format "%s%d%s%s" "^[[:blank:]]*\\([`]\\{" num-backticks ",\\}\\)"
+          (or end-of-line "$")))
+
 (defsubst markdown-make-tilde-fence-regex (num-tildes &optional end-of-line)
   "Return regexp matching a tilde code fence at least NUM-TILDES long.
 END-OF-LINE is the regexp construct to indicate end of line; $ if
@@ -1421,7 +1428,7 @@ giving the bounds of the current and parent list items."
      (markdown-get-yaml-metadata-end-border markdown-yaml-metadata-end)
      markdown-yaml-metadata-section)
     ((,markdown-regex-gfm-code-block-open markdown-gfm-block-begin)
-     (,markdown-regex-gfm-code-block-close markdown-gfm-block-end)
+     (markdown-make-gfm-fence-regex markdown-gfm-block-end)
      markdown-gfm-code))
   "Mapping of regular expressions to \"fenced-block\" constructs.
 These constructs are distinguished by having a distinctive start
@@ -1687,12 +1694,12 @@ MIDDLE-BEGIN is the start of the \"middle\" section of the block."
       (put-text-property close-begin close-end
                          (cl-cadadr fence-spec) close-data))))
 
-(defun markdown--triple-quote-single-line-p (begin)
+(defun markdown--code-fence-single-line-p (begin)
   (save-excursion
     (goto-char begin)
     (save-match-data
-      (and (search-forward "```" nil t)
-           (search-forward "```" (line-end-position) t)))))
+      (and (re-search-forward "`\\{3,\\}" nil t)
+           (re-search-forward "`\\{3,\\}" (line-end-position) t)))))
 
 (defun markdown-syntax-propertize-fenced-block-constructs (start end)
   "Propertize according to `markdown-fenced-block-pairs' from START to END.
@@ -1749,7 +1756,7 @@ start which was previously propertized."
                    0)))
                (prop (cl-cadar correct-entry)))
           (when (or (not (eq prop 'markdown-gfm-block-begin))
-                    (not (markdown--triple-quote-single-line-p block-start)))
+                    (not (markdown--code-fence-single-line-p block-start)))
             ;; get correct match data
             (save-excursion
               (beginning-of-line)
@@ -10551,7 +10558,7 @@ rows and columns and the column alignment."
 
 ;;;###autoload
 (add-to-list 'auto-mode-alist
-             '("\\.\\(?:md\\|markdown\\|mkd\\|mdown\\|mkdn\\|mdwn\\)\\'" . markdown-mode))
+             '("\\.\\(?:md\\|markdown\\|mkd\\|mdown\\|mkdn\\|mdwn\\|mdx\\)\\'" . markdown-mode))
 
 
 ;;; GitHub Flavored Markdown Mode  ============================================
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