updated docblocks of placard
updated docblocks of placard

deepdivedylan/aaaa-capstone,kdilts/aaaa-capstone,deepdivedylan/aaaa-capstone,kdilts/aaaa-capstone,deepdivedylan/aaaa-capstone,kdilts/aaaa-capstone,deepdivedylan/aaaa-capstone