Fix ObjectDisplayTests.Strings

src/Compilers/CSharp/Test/Symbol/SymbolDisplay/ObjectDisplayTests.cs

@@ -156,14 +156,14 @@ public void Strings()
             var s = sb.ToString();
 
             var expected =
-                @"""\0\u0001\u0002\u0003\u0004\u0005\u0006\a\b\t\n\v\f\r\u000e\u000f\u0010" +
-                @"\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d" +
-                @"\u001e\u001f !\""#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[" +
-                @"\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\u007f\u0080\u0081\u0082\u0083\u0084\u0085" +
-                @"\u0086\u0087\u0088\u0089\u008a\u008b\u008c\u008d\u008e\u008f\u0090\u0091\u0092" +
-                @"\u0093\u0094\u0095\u0096\u0097\u0098\u0099\u009a\u009b\u009c\u009d\u009e\u009f" +
-                @" ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèé" +
-                @"êëìíîïðñòóôõö÷øùúûüýþ""";
+                "\"\\0\u0001\u0002\u0003\u0004\u0005\u0006\\a\\b\\t\\n\\v\\f\\r\u000e\u000f\u0010" +
+                "\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d" +
+                "\u001e\u001f !\\\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[" +
+                "\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\u007f\u0080\u0081\u0082\u0083\u0084\u0085" +
+                "\u0086\u0087\u0088\u0089\u008a\u008b\u008c\u008d\u008e\u008f\u0090\u0091\u0092" +
+                "\u0093\u0094\u0095\u0096\u0097\u0098\u0099\u009a\u009b\u009c\u009d\u009e\u009f" +
+                " ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèé" +
+                "êëìíîïðñòóôõö÷øùúûüýþ\"";
             Assert.Equal(
                 expected,
                 ObjectDisplay.FormatString(s, useQuotes: true));