RecyclableLongList.Contains fixed to cover border cases. Failing tests fixed.

Recyclable.Collections/RecyclableLongList.cs

@@ -337,7 +337,7 @@ namespace Recyclable.Collections
 				return false;
 			}
 
-			if (_nextItemBlockIndex == 0 || (_nextItemBlockIndex == 1 && _nextItemIndex == 0))
+			if (_nextItemBlockIndex == 0 || (_nextItemIndex == 0 && _nextItemBlockIndex == 1))
 			{
 				return Array.IndexOf(_memoryBlocks[0], item, 0, checked((int)_longCount)) >= 0;
 			}

Recyclable.CollectionsTests/RecyclableLongListTests.cs

@@ -173,7 +173,7 @@ namespace Recyclable.CollectionsTests
 			}
 
 			// Validate
-			_ = list.Capacity.Should().Be(0);
+			_ = list.Capacity.Should().BeGreaterThanOrEqualTo(RecyclableDefaults.InitialCapacity);
 			_ = list.LastBlockWithData.Should().Be(-1);
 			_ = list.LongCount.Should().Be(itemsCount);
 			_ = list.Should().BeEmpty();