message: Better Cargo instructions
diff: @@ -19,8 +19,8 @@ You can build it using [Cargo][]:
  $ cd brilift
  - $ cargo build
  - $ cargo install # If you want the executable on your $PATH.
  + $ cargo run -- --help
  + $ cargo install --path . # If you want the executable on your $PATH.
  [bril-rs]: rust.md
  [cargo]: https://doc.rust-lang.org/cargo/
  