test null newline should be environment newline

src/TorchSharp/Tensor/TensorExtensionMethods.cs

@@ -259,7 +259,7 @@ public static string cstr(this Tensor tensor, string? fltFormat = "g5", int? wid
         /// The style to use -- either 'default,' 'metadata,' 'julia,' or 'numpy'
         /// </param>
         /// <returns></returns>
-        public static Tensor print(this Tensor t, string? fltFormat = "g5", int? width = 100, string? newLine = "\n", CultureInfo? cultureInfo = null, TensorStringStyle style = TensorStringStyle.Default)
+        public static Tensor print(this Tensor t, string? fltFormat = "g5", int? width = 100, string? newLine = null, CultureInfo? cultureInfo = null, TensorStringStyle style = TensorStringStyle.Default)
         {
             Console.WriteLine(t.ToString(style, fltFormat, width, cultureInfo, newLine));
             return t;

test/TorchSharpTest/TestTorchTensor.cs

@@ -287,15 +287,14 @@ public void TestToString1()
         public void TestTensorPrint()
         {
             Tensor t = torch.zeros(2, 2);
-            string expectedOutput = t.ToString(TensorStringStyle.Default, "g5", 100, null, "\n");
+            string expectedOutput = t.ToString(TensorStringStyle.Default, "g5", 100, null, Environment.NewLine);
             using (var sw = new StringWriter())
             {
                 Console.SetOut(sw);
                 t.print();
-                var result = sw.ToString().Trim();
+                var result = sw.ToString();
                 Assert.Equal(expectedOutput, result);
             }
-
         }
 
         [Fact]