A minor formatting issue on page 270

[MAS-OUD]

On page 270: WriteLine($"a == b: {(a == b)}"); unnecessary parentheses can be removed: WriteLine($"a == b: {a == b}");

[MAS-OUD]

might be a little confusing for the reader because curly braces surround the parenthesis immediately here.

[markjprice]

Thank you, Masoud. I have added an improvement item about this: https://github.com/markjprice/cs11dotnet7/blob/main/docs/errata/improvements.md#page-270---equality-of-types