def check_is_right(name):
    """
    Checks if the name belongs to a 'right' sequence (/2).  Returns True or
    False.

    Handles both Casava formats: seq/2 and 'seq::... 2::...'
    """
    if ' ' in name:                        # handle '@name 2:rst'
        name, rest = name.split(' ', 1)
        if rest.startswith('2:'):
            return True
    elif name.endswith('/2'):              # handle name/2
        return True

    return False