Auto merge of #29995 - DanielJCampbell:Expanded-Span-Printing, r=nrc
Auto merge of #29995 - DanielJCampbell:Expanded-Span-Printing, r=nrc

r? @nrc

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