src/README.md

   1 This directory contains the source code of the rust project, including:
   2 - `rustc` and its tests
   3 - `libstd`
   4 - Various submodules for tools, like rustdoc, rls, etc.
   5
   6 For more information on how various parts of the compiler work, see the [rustc guide].
   7
   8 [rustc guide]: https://rust-lang.github.io/rustc-guide/about-this-guide.html