Automatically exclude attributes from style/code analysis

[kzu]

When installing this package, its item is added to the compilation. If a style rule does not match with the code style in the code file, an analysis error might stop compilation.

To repro, add this to a project's .editorconfig:

# IDE0040: Add accessibility modifiers
dotnet_diagnostic.IDE0040.severity = error

(this setting will cause a build error if an accessibility modifier is added which is already the default for it, like adding internal to a class).

After installing the package, now you'll get the expected build error:

Severity    Code    Description Project File    Line    Suppression State
Error   IDE0040 Accessibility modifiers required    [ProjectName]   [ProjectPath]\obj\3.8.0\Debug\NuGet\3D28A4393902596C02B027108469F4ED40AA07C9\Nullable\1.0.0\Nullable\NullableAttributes.cs  46  Active

I have learned that this can be avoided by simply adding this to the code files somewhere (near the top?): // <auto-generated/>

That eliminates the (spurious) error shown above.

[kzu]

That said, the header all files have as of 1.3.0 does not cause this error either, so, I guess it's safe to close this :)