Update third-party exercises section

Add Third-Party List about rustlings-jp on README

README.md

@@ -135,9 +135,14 @@ Continue practicing your Rust skills by building your own projects, contributing
 
 ## Third-Party Exercises
 
+Third-party exercises are a set of exercises maintained by the community.
+You can use the same `rustlings` program that you installed with `cargo install rustlings` to run them:
+
+- [日本語版 Rustlings](https://github.com/sotanengel/rustlings-jp)：A Japanese translation of the Rustlings exercises.
+
 Do you want to create your own set of Rustlings exercises to focus on some specific topic?
 Or do you want to translate the original Rustlings exercises?
-Then follow the link to the guide about [third-party exercises](https://github.com/rust-lang/rustlings/blob/main/THIRD_PARTY_EXERCISES.md)!
+Then follow the the guide about [third-party exercises](https://github.com/rust-lang/rustlings/blob/main/THIRD_PARTY_EXERCISES.md)!
 
 ## Uninstalling Rustlings
 

solutions/08_enums/enums3.rs

@@ -46,8 +46,8 @@ impl State {
         match message {
             Message::Resize { width, height } => self.resize(width, height),
             Message::Move(point) => self.move_position(point),
-            Message::Echo(s) => self.echo(s),
+            Message::Echo(string) => self.echo(string),
-            Message::ChangeColor(r, g, b) => self.change_color(r, g, b),
+            Message::ChangeColor(red, green, blue) => self.change_color(red, green, blue),
             Message::Quit => self.quit(),
         }
     }