def print_markdown(data, title=None):
    """Print data in GitHub-flavoured Markdown format for issues etc.

    data (dict or list of tuples): Label/value pairs.
    title (unicode or None): Title, will be rendered as headline 2.
    """
    markdown = []
    for key, value in data.items():
        if isinstance(value, basestring_) and Path(value).exists():
            continue
        markdown.append("* **{}:** {}".format(key, unicode_(value)))
    if title:
        print("\n## {}".format(title))
    print("\n{}\n".format("\n".join(markdown)))