Merge 04701225ad into f9f845f28f

ftplugin/markdown.vim

@@ -54,6 +54,18 @@ function! MarkdownFold() abort
     return ">2"
   endif
 
+  " Front matter
+  if v:lnum == 1 && line == '---'
+    let b:markdown_frontmatter = 1
+    return ">1"
+  endif
+
+  " End of front matter
+  if (line == '...') && b:markdown_frontmatter
+    unlet b:markdown_frontmatter
+    return '<1'
+  endif
+
   return "="
 endfunction