Replace list with only one element to the value of the element.

    :param dev:
    :return:

def _normalize_info(dev):
    '''
    Replace list with only one element to the value of the element.

    :param dev:
    :return:
    '''
    for sect, val in dev.items():
        if len(val) == 1:
            dev[sect] = val[0]

    return dev