Merge pull request rust-lang#2331 from chapeupreto/minor-improvements

chore: minor improvements

Author: mo8it

exercises/09_strings/README.md

@@ -1,6 +1,6 @@
 # Strings
 
-Rust has two string types, a string slice (`&str`) and an owned string (`String`).
+Rust has two string types: a string slice (`&str`) and an owned string (`String`).
 We're not going to dictate when you should use which one, but we'll show you how
 to identify and create them, as well as use them.
 

rustlings-macros/info.toml

@@ -21,7 +21,7 @@ get started, here are some notes about how Rustlings operates:
 
 final_message = """
 We hope you enjoyed learning about the various aspects of Rust!
-If you noticed any issues, don't hesitate to report them on Github.
+If you noticed any issues, don't hesitate to report them on GitHub.
 You can also contribute your own exercises to help the greater community!
 
 Before reporting an issue or contributing, please read our guidelines: