feat: highlight Markdown list markers

src/syntax.rs

@@ -1730,6 +1730,35 @@ mod tests {
         assert_eq!(kind_at(&cache, 10, 6), None);
     }
 
+    #[test]
+    fn markdown_list_markers_color_bullets_and_numbers_without_coloring_plain_text() {
+        let source = "- item\n  - nested\n  12. ordered\n\n+ item\n\n* item\n\n1. ordered\n2. next\n\n3) ordered\n\n> - quoted\n> 4. ordered\n\nplain - text and 1. text\n\n\\- escaped";
+        let mut cache = self::cache(source, "lists.md");
+        for (row, marker) in [
+            (0, "-"),
+            (1, "-"),
+            (2, "12."),
+            (4, "+"),
+            (6, "*"),
+            (8, "1."),
+            (9, "2."),
+            (11, "3)"),
+            (13, "-"),
+            (14, "4."),
+        ] {
+            assert_token(&cache, source, row, marker, SyntaxKind::Markup);
+        }
+        assert_eq!(kind_at(&cache, 0, 2), None);
+        assert_eq!(kind_at(&cache, 16, 6), None);
+        assert_eq!(kind_at(&cache, 16, 17), None);
+        assert_ne!(kind_at(&cache, 18, 1), Some(SyntaxKind::Markup));
+
+        let edited = source.replacen("- item", "plain - item", 1);
+        cache.update(&lines(&edited), Some(Path::new("lists.md")), 1);
+        assert_eq!(kind_at(&cache, 0, 6), None);
+        assert_fresh(&cache, &edited, "lists.md");
+    }
+
     #[test]
     fn markdown_inline_and_fences_inject_known_languages_and_update_incrementally() {
         let original = "A **bold** and `code` link.\n\n```rust\nfn main() { let n = 42; }\n```\n\n```python\ndef hello():\n    return 7\n```\n\n```not-a-language\nfn not_rust() { 99; }\n```";

src/syntax/languages.rs

@@ -60,6 +60,14 @@ static MD_HIGHLIGHTS: LazyLock<String> = LazyLock::new(|| {
   (setext_h1_underline)
   (setext_h2_underline)
 ] @text.title
+
+[
+  (list_marker_minus)
+  (list_marker_plus)
+  (list_marker_star)
+  (list_marker_dot)
+  (list_marker_parenthesis)
+] @markup.list
 ",
     ]
     .join("\n")