"Fix whitespace formatting." is not very useful. Please add an option to show a diff of the formatting rule violation.

I have enabled `dotnet-format --check` on our build server, but it fails hard. This is not the case locally, where it runs successfully.

For reference see https://ci.appveyor.com/project/icsharpcode/ilspy/builds/34921427/job/f80qltt0knx4dwka

I use the `--verbosity diagnostic` setting, but the error message "Fix whitespace formatting." is not very useful. How do other people using dotnet-format debug formatting issues on their CI system?

Would it be possible to add a diff of the change that was performed by the formatter? Could also be a new option `--verbosity show-diff` or similar.

Thank you very much!