from typing import Sequence


def string_list_to_html(string_list: Sequence[str]) -> str:
    """
    Converts a string list to an HTML bullet list.
    """
    if not string_list:
        return "<p>None</p>"
    item_list = [f"<li><code>{item}</code></li>" for item in string_list]
    return "<ul>" + "".join(item_list) + "</ul>"