Runs multiple formatters instead of one

I want to format a file to "file-scoped namespaces". I want to make that change only.

My `.editorconfig` contains this only:
````ini
[*.cs]
csharp_style_namespace_declarations = file_scoped:warning # config for IDE0161
````

A test file `Foo.cs`:
````cs
namespace MyNamespace
{

public class Foo
{

public Foo(int someInt, string someString)
{
_someInt = someInt; // aligned
_someString = someString; // aligned
}

private readonly int _someInt;
private readonly string _someString;

}
}
````

I run this:
````sh
dotnet format MyProject.csproj --severity info --diagnostics=IDE0161 --include=Foo.cs
````

The result:
````cs
namespace MyNamespace;

public class Foo
{

public Foo(int someInt, string someString)
{
_someInt = someInt; // not aligned
_someString = someString; // not aligned
}

private readonly int _someInt;
private readonly string _someString;

}
````

The alignment is changed as shown. There are various other places where alignment is changed too.

I only want to run one analyser/fixer - `IDE0161`. I don't want the format command to do anything else.

How do I do that?

(Note if I run the code fix in vscode, it works. It's only via `dotnet format` that it fails. However I can't change 1000s of files via the IDE, that would take forever.)