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Refactor `fmt::Display` impls in rustdoc This PR does a couple of things, with the intention of cleaning up and streamlining some of the `fmt::Display` impls in rustdoc: 1. Use the unstable [`fmt::from_fn`](https://github.com/rust-lang/rust/issues/117729) instead of open-coding it. 2. ~~Replace bespoke implementations of `Itertools::format` with the method itself.~~ 4. Some more minor cleanups - DRY, remove unnecessary calls to `Symbol::as_str()`, replace some `format!()` calls with lazier options The changes are mostly cosmetic but some of them might have a slight positive effect on performance.
This directory contains some source code for the Rust project, including:
- The bootstrapping build system
- Various submodules for tools, like cargo, tidy, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.