Auto merge of #30169 - shepmaster:for-loop-into-iterator, r=steveklabnik
Auto merge of #30169 - shepmaster:for-loop-into-iterator, r=steveklabnik

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