add missing comment & [Fact] attribute

src/Microsoft.FeatureManagement/FeatureDefinition.cs

@@ -44,7 +44,7 @@ public class FeatureDefinition
         public IEnumerable<VariantDefinition> Variants { get; set; } = Enumerable.Empty<VariantDefinition>();
 
         /// <summary>
-        /// A flag to enable or disable sending telemetry events to the registered <see cref="ITelemetryPublisher">.
+        /// A flag to enable or disable sending telemetry events to the registered <see cref="Telemetry.ITelemetryPublisher"/>.
         /// </summary>
         public bool TelemetryEnabled { get; set; }
 

src/Microsoft.FeatureManagement/FeatureManagementBuilderExtensions.cs

@@ -42,6 +42,7 @@ private static IFeatureManagementBuilder AddTelemetryPublisher(this IFeatureMana
             return builder;
         }
 
+        /// <summary>
         /// Adds an <see cref="ITargetingContextAccessor"/> to be used for targeting and registers the targeting filter to the feature management system.
         /// </summary>
         /// <param name="builder">The <see cref="IFeatureManagementBuilder"/> used to customize feature management functionality.</param>

tests/Tests.FeatureManagement/FeatureManagement.cs

@@ -1030,6 +1030,7 @@ public async Task TelemetryPublishingNullPublisher()
             Assert.True(result);
         }
 
+        [Fact]
         public async Task UsesVariants()
         {
             IConfiguration config = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();