lua string.fromat
lua里format打印boolean类型，如果使用了%s或%d会报如下错误：bad argument #2 to ‘format’ (string expected, got boolean)解决方法：查了如下，把boolean转换成string再打印。https://stackoverflow.com/questions/46056455/bad-argument-3-to-format-string-expected-got-booleanYou need to manually eval
