Fix for Fix test assertions to work across Python ver. 3.11 & 3.12

The HTTP 413 status message differs between Python versions:
- Python 3.13: "Content Too Large"
- Python 3.11: "Request Entity Too Large"

Updated test assertions to use assertIn("HTTP 413:") instead of exact
string matching to ensure tests pass across supported Python versions
while still verifying that HTTP status context is properly added to
XML parsing errors.

Author: adev-code

tests/unit/test_parsers.py

@@ -1640,7 +1640,7 @@ def test_query_parser_empty_body_4xx_error_with_notes(self):
 
         self.assertTrue(hasattr(exception, '__notes__'))
         self.assertEqual(len(exception.__notes__), 1)
-        self.assertEqual(exception.__notes__[0], "HTTP 413: Content Too Large")
+        self.assertIn("HTTP 413:", exception.__notes__[0])
 
     def test_parse_error_from_body_empty_body_4xx_error_with_notes(self):
         parser = parsers.RestXMLParser()
@@ -1661,7 +1661,7 @@ def test_parse_error_from_body_empty_body_4xx_error_with_notes(self):
 
         self.assertTrue(hasattr(exception, '__notes__'))
         self.assertEqual(len(exception.__notes__), 1)
-        self.assertEqual(exception.__notes__[0], "HTTP 413: Content Too Large")
+        self.assertIn("HTTP 413:", exception.__notes__[0])
 
 
 def _generic_test_bodies():