def cancel(watson):
    """
    Cancel the last call to the start command. The time will
    not be recorded.
    """
    old = watson.cancel()
    click.echo("Canceling the timer for project {}{}".format(
        style('project', old['project']),
        (" " if old['tags'] else "") + style('tags', old['tags'])
    ))
    watson.save()

    Cancel the last call to the start command. The time will
    not be recorded.
    
watson/cli.py