解决方法
没有必要.如果应用于一个类,它只会抑制Class扩展中的所有方法的文档(rdoc).在编程Ruby中描述为：
:nodoc: – Don’t include this element in the documentation. For classes and modules,the methods,aliases,constants,and attributes directly within the affected class or module will also be omitted from the documentation. By default,though,modules and classes within that class or module will be documented.