*by Steve Klabnik and Carol Nichols, with contributions from the Rust Community*
-This version of the text assumes you’re using Rust 1.48 or later with
+This version of the text assumes you’re using Rust 1.49 or later with
`edition="2018"` in *Cargo.toml* of all projects to use Rust 2018 Edition
idioms. See the [“Installation” section of Chapter 1][install]<!-- ignore -->
to install or update Rust, and see the new [Appendix E][editions]<!-- ignore