def merge_verifyta_args(cfg_dict):
    """
    Concatenate and format a string of verifyta
    arguments given by the .yaml configuration file.
    """
    args = ""
    for k, v in cfg_dict.items():
        if (v != None):
            args += " --" + k + " " + str(v)
        else:
            args += " --" + k
    return args[1:]