[librustc_passes](https://github.com/rust-lang/rust/blob/master/src/librustc_passes/diagnostics.rs),
[librustc_privacy](https://github.com/rust-lang/rust/blob/master/src/librustc_privacy/diagnostics.rs),
[librustc_resolve](https://github.com/rust-lang/rust/blob/master/src/librustc_resolve/diagnostics.rs),
- [librustc_trans](https://github.com/rust-lang/rust/blob/master/src/librustc_trans/diagnostics.rs),
+ [librustc_codegen_llvm](https://github.com/rust-lang/rust/blob/master/src/librustc_codegen_llvm/diagnostics.rs),
[librustc_plugin](https://github.com/rust-lang/rust/blob/master/src/librustc_plugin/diagnostics.rs),
[librustc_typeck](https://github.com/rust-lang/rust/blob/master/src/librustc_typeck/diagnostics.rs).
* Explanations have full markdown support. Use it, especially to highlight