Undo special case for test hang.

Ix.NET/Source/System.Linq.Async.Queryable.Tests/AsyncQueryableTests.Generated.cs

@@ -4805,7 +4805,8 @@ namespace Tests
             AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeLast<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
 
             var res = AsyncQueryable.TakeLast<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-            // TODO: investigate test hang
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
         }
 
         [Fact]

Ix.NET/Source/System.Linq.Async.Queryable.Tests/AsyncQueryableTests.Generated.tt

@@ -15,7 +15,7 @@
 <#@ output extension=".cs" #>
 <#
 var nullableParameterNames = new[] { "comparer" };
-var failing = new[] { "TakeLast" };
+var failing = new string[0];
 var exclude = new[] { "ForEach", "ForEachAsync", "ToEnumerable", "ToAsyncEnumerable", "ToObservable", "AsAsyncEnumerable", "WithCancellation" };
 
 var toQuotedImpl = default(Func<Type, int, bool, string>);