- **Possible values**: `2015`, `2018`
- **Stable**: Yes
-### Example
-
-If you want to format code that requires edition 2018, add the following to your config file:
+Rustfmt is able to pick up the edition used by reading the `Cargo.toml` file if executed
+through the Cargo's formatting tool `cargo fmt`. Otherwise, the edition needs to be specified
+in your config file:
```toml
edition = "2018"