Fix build issues with net9 (#644)

Author: viceroypenguin

Tests/SuperLinq.Test/ReturnTest.cs

@@ -1,4 +1,4 @@
-namespace Test;
+namespace Test;
 
 public class ReturnTest
 {
@@ -91,6 +91,7 @@ public void TestIndexOfAnItemNotContainedIsNegativeOne()
 	}
 
 #pragma warning disable IDE0200 // Remove unnecessary lambda expression
+#pragma warning disable IDE0300 // Collection initialization can be simplified
 	public static IEnumerable<object[]> UnsupportedActions() =>
 		new Action[][]
 		{
@@ -101,6 +102,7 @@ public static IEnumerable<object[]> UnsupportedActions() =>
 			[() => SomeSingleton.List.Insert(0, new object()),],
 			[() => SomeSingleton.List[0] = new object(),],
 		};
+#pragma warning restore IDE0300 // Collection initialization can be simplified
 #pragma warning restore IDE0200 // Remove unnecessary lambda expression
 
 	[Theory, MemberData(nameof(UnsupportedActions))]

Tests/SuperLinq.Test/UpdatablePriorityQueueTest.cs

@@ -1,4 +1,4 @@
-// Licensed to the .NET Foundation under one or more agreements.
+// Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // copied from https://github.com/dotnet/runtime/tree/main/src/libraries/System.Collections/tests/Generic/PriorityQueue
 // and further edited
@@ -439,14 +439,13 @@ public void UpdatablePriorityQueue_Generic_EnqueueRange_ChangesPriority()
 			queue.EnqueueRange(["alpha", "bravo", "charlie", "delta", "echo",], 30);
 
 			queue.EnqueueRange(
-				new[]
-				{
+				[
 					("alpha", 50),
 					("bravo", 40),
 					("charlie", 30),
 					("delta", 20),
 					("echo", 10),
-				});
+				]);
 
 			queue.UnorderedItems.AssertCollectionEqual(
 				("alpha", 50),
@@ -494,14 +493,13 @@ public void UpdatablePriorityQueue_Generic_EnqueueRangeMinimum_UsesLowestPriorit
 			queue.EnqueueRange(["alpha", "bravo", "charlie", "delta", "echo",], 30);
 
 			queue.EnqueueRangeMinimum(
-				new[]
-				{
+				[
 					("alpha", 50),
 					("bravo", 40),
 					("charlie", 30),
 					("delta", 20),
 					("echo", 10),
-				});
+				]);
 
 			queue.UnorderedItems.AssertCollectionEqual(
 				("alpha", 30),