Fix doctest for 3.13

stdlib/@tests/stubtest_allowlists/py313.txt

@@ -81,8 +81,6 @@ dis.disassemble
 dis.disco
 dis.distb
 dis.get_instructions
-doctest.TestResults.__doc__
-doctest.TestResults.__new__
 email.utils.getaddresses
 email.utils.parseaddr
 filecmp.dircmp.__init__
@@ -255,6 +253,7 @@ ast.ImportFrom.level  # None on the class, but never None on instances
 builtins.property.__set_name__  # Doesn't actually exist
 collections\.UserList\.index  # ignoring pos-or-keyword parameter
 dataclasses.KW_ONLY  # white lies around defaults
+doctest.TestResults.__new__ # NamedTuple with key-word only default
 enum.auto.__init__  # The stub for enum.auto is nothing like the implementation
 enum.auto.value  # The stub for enum.auto is nothing like the implementation
 functools._lru_cache_wrapper.cache_parameters  # Cannot be detected statically

stdlib/doctest.pyi

@@ -1,3 +1,4 @@
+import sys
 import types
 import unittest
 from _typeshed import ExcInfo
@@ -42,6 +43,9 @@ __all__ = [
 ]
 
 class TestResults(NamedTuple):
+    if sys.version_info >= (3, 13):
+        def __new__(cls, failed: int, attempted: int, *, skipped: int = 0) -> None: ...
+        skipped: int
     failed: int
     attempted: int
 
@@ -134,6 +138,8 @@ class DocTestRunner:
     original_optionflags: int
     tries: int
     failures: int
+    if sys.version_info >= (3, 13):
+        skips: int
     test: DocTest
     def __init__(self, checker: OutputChecker | None = None, verbose: bool | None = None, optionflags: int = 0) -> None: ...
     def report_start(self, out: _Out, test: DocTest, example: Example) -> None: ...