react: Use `&[...]` instead of `&vec![...]`
react: Use `&[...]` instead of `&vec![...]`

Clippy suggested:
useless use of `vec!`

https://rust-lang-nursery.github.io/rust-clippy/master/index.html#useless_vec

exercism/xrust,petertseng/exercism-rust,petertseng/exercism-rust,petertseng/exercism-rust,exercism/xrust