diff --git a/util/html.py b/util/html.py
--- a/util/html.py
+++ b/util/html.py
@@ -85,7 +85,9 @@ case "li":
                 if self.list_stack:
                     ltype, idx = self.list_stack[-1]
                     indent = "  " * (len(self.list_stack) - 1)
-                    self.append_text(f"{indent}- " if ltype == "ul" else f"{indent}{idx + 1}. ")
+                    self.append_text(
+                        f"{indent}- " if ltype == "ul" else f"{indent}{idx + 1}. "
+                    )
                     self.list_stack[-1] = (ltype, idx + 1)
             case _:
                 # self.builder.extend(f"<{tag}>".encode("utf-8"))