Rollup merge of #77256 - jyn514:typo, r=Aaron1011
Rollup merge of #77256 - jyn514:typo, r=Aaron1011

Fix typo in ExpnData documentation

This mis-highlighted the entire documentation as code: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_span/hygiene/struct.ExpnData.html#structfield.krate

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