Updated unit test to test just inserted code, to work around unit test...

Updated unit test to test just inserted code, to work around unit test infrastructure  assumption that all code is `\r\n`

src/EditorFeatures/CSharpTest/DocumentationComments/DocumentationCommentTests.cs

@@ -38,9 +38,9 @@ class C
         [WpfFact, Trait(Traits.Feature, Traits.Features.DocumentationComments)]
         public void TypingCharacter_Class_NewLine()
         {
-            var code = "//$$\nclass C\n{\n}";
+            var code = "//$$\r\nclass C\r\n{\r\n}";
 
-            var expected = "/// <summary>\n/// $$\n/// </summary>\nclass C\n{\n}";
+            var expected = "/// <summary>\n/// $$\n/// </summary>\r\nclass C\r\n{\r\n}";
 
             VerifyTypingCharacter(code, expected, newLine: "\n");