[PR #12350/7eb05774 backport][3.13] Fix octal tests (#12401)

**This is a backport of PR #12350 as merged into master
(7eb0577).**

Co-authored-by: Sam Bull <git@sambull.org>

Author: patchback[bot]

tests/test_cookie_helpers.py

@@ -1095,13 +1095,13 @@ def test_parse_set_cookie_headers_date_formats_with_attributes() -> None:
 @pytest.mark.parametrize(
     ("header", "expected_name", "expected_value", "expected_coded"),
     [
-        # Test cookie values with octal escape sequences
-        (r'name="\012newline\012"', "name", "\nnewline\n", r'"\012newline\012"'),
+        # Test cookie values with octal escape sequences (printable chars only)
+        (r'name="\050parens\051"', "name", "(parens)", r'"\050parens\051"'),
         (
-            r'tab="\011separated\011values"',
-            "tab",
-            "\tseparated\tvalues",
-            r'"\011separated\011values"',
+            r'punct="\053plus\053values"',
+            "punct",
+            "+plus+values",
+            r'"\053plus\053values"',
         ),
         (
             r'mixed="hello\040world\041"',
@@ -1110,10 +1110,10 @@ def test_parse_set_cookie_headers_date_formats_with_attributes() -> None:
             r'"hello\040world\041"',
         ),
         (
-            r'complex="\042quoted\042 text with \012 newline"',
+            r'complex="\042quoted\042 text with \055 hyphen"',
             "complex",
-            '"quoted" text with \n newline',
-            r'"\042quoted\042 text with \012 newline"',
+            '"quoted" text with - hyphen',
+            r'"\042quoted\042 text with \055 hyphen"',
         ),
     ],
 )