src/README.md

   1 This directory contains the source code of the rust project, including:
   2
   3 - The test suite
   4 - The bootstrapping build system
   5 - Various submodules for tools, like rustdoc, rls, etc.
   6
   7 For more information on how various parts of the compiler work, see the [rustc dev guide].
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   9 [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/about-this-guide.html