Tools/clinic/clinic.py:536: error: Incompatible types in assignment (expression has type "list[Iterable[Parameter] | Parameter]", variable has type "list[Iterable[Parameter]]")  [assignment]Tools/clinic/clinic.py:553: error: Argument 1 to "extend" of "list" has incompatible type "Iterable[Parameter]"; expected "Iterable[Iterable[Parameter]]"  [arg-type]Tools/clinic/clinic.py:584: error: Argument 1 to "append" of "list" has incompatible type "tuple[Iterable[Parameter], ...]"; expected "Iterable[Parameter]"  [arg-type]Tools/clinic/clinic.py:586: error: Argument "key" to "sort" of "list" has incompatible type "Callable[[Sized], int]"; expected "Callable[[Iterable[Parameter]], SupportsDunderLT[Any] | SupportsDunderGT[Any]]"  [arg-type]

--- a/Tools/clinic/clinic.py+++ b/Tools/clinic/clinic.py@@ -28,7 +28,7 @@ import textwrap import traceback-from collections.abc import Callable+from collections.abc import Callable, Iterable, Iterator, Sequence from types import FunctionType, NoneType from typing import (     Any,@@ -516,7 +516,11 @@ class PythonLanguage(Language):     checksum_line = "#/*[{dsl_name} end generated code: {arguments}]*/"-def permute_left_option_groups(l):+SequenceOfParameterGroups = Sequence[Iterable["Parameter"]]+ParameterTuple = tuple["Parameter", ...]+++def permute_left_option_groups(l: SequenceOfParameterGroups) -> Iterator[ParameterTuple]:     """     Given [(1,), (2,), (3,)], should yield:        ()@@ -525,13 +529,13 @@ def permute_left_option_groups(l):        (1, 2, 3)     """     yield tuple()-    accumulator = []+    accumulator: list[Parameter] = []     for group in reversed(l):         accumulator = list(group) + accumulator         yield tuple(accumulator)-def permute_right_option_groups(l):+def permute_right_option_groups(l: SequenceOfParameterGroups) -> Iterator[ParameterTuple]:     """     Given [(1,), (2,), (3,)], should yield:       ()@@ -540,13 +544,17 @@ def permute_right_option_groups(l):       (1, 2, 3)     """     yield tuple()-    accumulator = []+    accumulator: list[Parameter] = []     for group in l:         accumulator.extend(group)         yield tuple(accumulator)-def permute_optional_groups(left, required, right):+def permute_optional_groups(+    left: SequenceOfParameterGroups,+    required: Iterable[Parameter],+    right: SequenceOfParameterGroups+) -> tuple[ParameterTuple, ...]:     """     Generator function that computes the set of acceptable     argument lists for the provided iterables of@@ -561,7 +569,7 @@ def permute_optional_groups(left, required, right):         if left:             raise ValueError("required is empty but left is not")-    accumulator = []+    accumulator: list[ParameterTuple] = []     counts = set()     for r in permute_right_option_groups(right):         for l in permute_left_option_groups(left):