Moving Scan to AsyncEnumerableEx.

Ix.NET/Source/System.Interactive.Async.Tests/AsyncTests.Single.cs

@@ -3190,11 +3190,11 @@ namespace Tests
         [Fact]
         public void Scan_Null()
         {
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.Scan(default(IAsyncEnumerable<int>), 3, (x, y) => x + y));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.Scan(AsyncEnumerable.Return(42), 3, default(Func<int, int, int>)));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.Scan(default(IAsyncEnumerable<int>), 3, (x, y) => x + y));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.Scan(AsyncEnumerable.Return(42), 3, default(Func<int, int, int>)));
 
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.Scan(default(IAsyncEnumerable<int>), (x, y) => x + y));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.Scan(AsyncEnumerable.Return(42), default(Func<int, int, int>)));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.Scan(default(IAsyncEnumerable<int>), (x, y) => x + y));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.Scan(AsyncEnumerable.Return(42), default(Func<int, int, int>)));
         }
 
         [Fact]

Ix.NET/Source/System.Interactive.Async/Scan.cs → Ix.NET/Source/System.Interactive.Async/System/Linq/Operators/Scan.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace System.Linq
 {
-    public static partial class AsyncEnumerable
+    public static partial class AsyncEnumerableEx
     {
         public static IAsyncEnumerable<TSource> Scan<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, TSource> accumulator)
         {