def justify_center(content: str, width: int, symbol: str):
    """Centers string in symbol - width chars wide.
    
    :param content (str) : String to be centered.
    :param width (int) : Column width to center within.
    :param symbol (str) : Symbol to fill the space.
    :return (str) : Content, centered.
    """

    text = content
    lines = text.split("\n")
    for i in range(len(lines)):
        lines[i] = lines[i].center(width, symbol)
    text = "\n".join(lines)
    return text