Apply suggestions from code review

Author: BrennanConroy

src/DataProtection/DataProtection/test/Microsoft.AspNetCore.DataProtection.Tests/HostingTests.cs

@@ -25,7 +25,7 @@ public async Task WebhostLoadsKeyRingBeforeServerStarts()
             .Returns(Mock.Of<IKeyRing>())
             .Callback(() => tcs.TrySetResult());
 
-#pragma warning disable CS0618 // Type or member is obsolete
+#pragma warning disable ASPDEPR004 // Type or member is obsolete
         var builder = new WebHostBuilder()
             .UseStartup<TestStartup>()
             .ConfigureServices(s =>
@@ -34,7 +34,7 @@ public async Task WebhostLoadsKeyRingBeforeServerStarts()
                 .Replace(ServiceDescriptor.Singleton(mockKeyRing.Object))
                 .AddSingleton<IServer>(
                     new FakeServer(onStart: () => tcs.TrySetException(new InvalidOperationException("Server was started before key ring was initialized")))));
-#pragma warning restore CS0618 // Type or member is obsolete
+#pragma warning restore ASPDEPR004 // Type or member is obsolete
 
         using (var host = builder.Build())
         {

src/Hosting/Hosting/src/WebHostBuilder.cs

@@ -20,7 +20,7 @@ namespace Microsoft.AspNetCore.Hosting;
 /// <summary>
 /// A builder for <see cref="IWebHost"/>
 /// </summary>
-[Obsolete("WebHostBuilder is deprecated in favor or HostBuilder and WebApplicationBuilder. For more information, visit https://aka.ms/aspnet/deprecate/004.", DiagnosticId = "ASPDEPR004")]
+[Obsolete("WebHostBuilder is deprecated in favor of HostBuilder and WebApplicationBuilder. For more information, visit https://aka.ms/aspnet/deprecate/004.", DiagnosticId = "ASPDEPR004")]
 public class WebHostBuilder : IWebHostBuilder
 {
     private readonly HostingEnvironment _hostingEnvironment;