嵌套评论

在注释（单行或分隔）内开始新注释（单行或分隔）无效并被忽略。例子：

-- This is a single-line comment. This second -- has no special meaning.

-- This is a single-line comment. This /* has no special meaning.

/* This is not a
single-line comment.
And this -- has no
special meaning. */

/* This is not a
single-line comment.
And this second /* has no
special meaning. */