Rollup merge of #81144 - nhwn:typo-map-while, r=jackh726
Rollup merge of #81144 - nhwn:typo-map-while, r=jackh726

Fixed formatting typo in map_while docs

changes `` ` None` `` to ``[`None`]`` for consistency

graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust