Update src/librustdoc/lib.rs from suggestion
Update src/librustdoc/lib.rs from suggestion

Co-authored-by: Ivan Tham <1caaae66ad2b6814584001fdaa761fdc4f6b3dff@riseup.net>
graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust