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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def download_url(url, destination, retries=None, retry_delay=None, runner=None):
 """Download the given URL with wget to the provided path. The command is run via Fabric on the current remote machine. Therefore, the destination path should be for the remote machine. :param str url: URL to download onto the remote machine :param str destination: Path to download the URL to on the remote machine :param int retries: Max number of times to retry downloads after a failure :param float retry_delay: Number of seconds between download retries :param FabRunner runner: Optional runner to use for executing commands. :return: The results of the wget call """

    runner = runner if runner is not None else FabRunner()
    return try_repeatedly(
        lambda: runner.run("wget --quiet --output-document '{0}' '{1}'".format(destination, url)),
        max_retries=retries,
        delay=retry_delay
    )