Trimming warning is misleading

[richlander]

I see this warning when attempting to trim an ASP.NET Core app.

/Users/rich/git/dotnet-docker/samples/aspnetapp/aspnetapp/Program.cs(6,1): warning IL2026: Using member 'Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddRazorPages(IServiceCollection)' which has 'RequiresUnreferencedCodeAttribute' can break functionality when trimming application code. Razor Pages does not currently support native AOT. https://aka.ms/aspnet/nativeaot [/Users/rich/git/dotnet-docker/samples/aspnetapp/aspnetapp/aspnetapp.csproj]

I find it confusing. It would be more helpful to me if the following subset said this:

... can break functionality when trimming application code. Razor Pages does not currently support trimming or native AOT. Learn more: https://aka.ms/aspnet/trimming

@dotnet/illink-contrib a new issue has been filed in the ILLink area, please triage

[eerhardt]

FYI - @mitchdenny