def escape_star(line):
    """Escape all unmatched stars (*) so Sphinx know they aren't markup"""
    line_split = line.split()

    for index, value in enumerate(line_split):
        # Star is only added to the end of the word, if the are used for markup
        if not value.endswith('*'):
            line_split[index] = line_split[index].replace("*", "\\*")

    return ' '.join(line_split)