Add "rustup doc --reference"
Add "rustup doc --reference"

Add this as shorthand for The Rust Reference.
nodakai/rustup.rs,nodakai/rustup.rs,inejge/rustup.rs,nodakai/rustup.rs,nodakai/rustup.rs,inejge/rustup.rs,rust-lang/rustup,rust-lang/rustup,inejge/rustup.rs,inejge/rustup.rs,rust-lang/rustup,inejge/rustup.rs,nodakai/rustup.rs,rust-lang/rustup,rust-lang/rustup