Rollup merge of #45172 - oli-obk:patch-8, r=pnkfelix
Rollup merge of #45172 - oli-obk:patch-8, r=pnkfelix

Upgrade some comments to doc comments

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