prevent SyntaxError/SyntaxWarning in test_fstring

Author: graingert

Lib/test/test_fstring.py

@@ -1651,7 +1651,7 @@ def __repr__(self):
 
     def test_debug_expressions_are_raw_strings(self):
 
-        self.assertEqual(f'{b"\N{OX}"=}', 'b"\\N{OX}"=b\'\\\\N{OX}\'')
+        self.assertEqual(f'{b"\\N{OX}"=}', 'b"\\N{OX}"=b\'\\\\N{OX}\'')
         self.assertEqual(f'{r"\xff"=}', 'r"\\xff"=\'\\\\xff\'')
         self.assertEqual(f'{r"\n"=}', 'r"\\n"=\'\\\\n\'')
         self.assertEqual(f"{'\''=}", "'\\''=\"'\"")