[lldb][test] Fix MSVC std::string formatter tests

These were mistakenly changed during #147525

Author: Michael137

lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/string/TestDataFormatterStdString.py

@@ -225,6 +225,9 @@ def test_unavailable_summary_libstdcxx(self):
         self.build(dictionary={"USE_LIBSTDCPP": 1})
         self.do_test_summary_unavailable()
 
+    @expectedFailureAll(
+        bugnumber="MSVC std::string summary provider doesn't output a user-friendly message for invalid strings."
+    )
     @add_test_categories(["msvcstl"])
     def test_unavailable_summary_msvc(self):
         self.build()

lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/u8string/TestDataFormatterStdU8String.py

@@ -22,7 +22,7 @@ def do_test(self):
                 '(std::u8string) u8_string_small = u8"🍄"',
                 '(std::u8string) u8_string = u8"❤️👍📄📁😃🧑‍🌾"',
                 '(std::u8string) u8_empty = u8""',
-                '(std::u8string) u8_text = u8"ABC"',
+                '(std::u8string) u8_text = u8"ABCd"',
             ],
         )