Install rustfmt

bash

rustup component add rustfmt

Explanation

Required before running `cargo fmt` on some toolchains.

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Show installed and available components for active toolchain.

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Add the Clippy lint component.

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Add standard library source code.

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Launch the locally installed Rust documentation.

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Display toolchains available on the machine.

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Check in a `rust-toolchain.toml` file.

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