Merge branch 'release/2.1' into dev

src/Microsoft.AspNetCore.Mvc.Core/ApiControllerAttribute.cs

@@ -7,7 +7,7 @@ using Microsoft.AspNetCore.Mvc.Internal;
 namespace Microsoft.AspNetCore.Mvc
 {
     /// <summary>
-    /// Indicates that a type and all derived types are used to serve HTTP API responses. The presense of
+    /// Indicates that a type and all derived types are used to serve HTTP API responses. The presence of
     /// this attribute can be used to target conventions, filters and other behaviors based on the purpose
     /// of the controller.
     /// </summary>