Unnamed repository; edit this file 'description' to name the repository.
Rollup merge of #145040 - tshepang:rdg-sync, r=Kobzol
rustc-dev-guide subtree update
Subtree update of `rustc-dev-guide` to https://github.com/rust-lang/rustc-dev-guide/commit/1beca6333e2de8df2d002613c7c8fce55a1a1257.
Created using https://github.com/rust-lang/josh-sync.
r? `@ghost`
