🩹 minor fixes for some internal cython module stubs (#878)

Author: jorenham

scipy-stubs/io/matlab/_mio5_utils.pyi

@@ -16,8 +16,8 @@ _bint: TypeAlias = Literal[0, 1] | bool  # noqa: PYI042
 ###
 
 # NOTE: These apprear to be broken, and will always raise `TypeError: no default __reduce__ due to non-trivial __cinit__`
-def __reduce_cython__(self: Never) -> Never: ...  # undocumented
-def __setstate_cython__(self: Never, __pyx_state: Never) -> None: ...  # undocumented  # pyright: ignore[reportGeneralTypeIssues]
+def __reduce_cython__(self: Never, /) -> Never: ...  # undocumented
+def __setstate_cython__(self: Never, pyx_state: Never, /) -> None: ...  # undocumented
 
 swapped_code: Final[Literal[">", "<"]] = ...  # undocumented  # ">" sys.byteorder == "little" else "<"
 

scipy-stubs/stats/_biasedurn.pyi

@@ -1,14 +1,14 @@
 # see `scipy/stats/_biasedurn.pyx`
 
-from typing import type_check_only
+from typing import Never, Self, type_check_only
 
 import numpy as np
 import optype as op
 import optype.numpy as onp
 
 @type_check_only
 class _PyNCHypergeometric:
-    def __init__(self, /, n: op.CanInt, m: op.CanInt, N: op.CanInt, odds: op.CanFloat, accuracy: op.CanFloat) -> None: ...
+    def __new__(cls, /, n: op.CanInt, m: op.CanInt, N: op.CanInt, odds: op.CanFloat, accuracy: op.CanFloat) -> Self: ...
     def mode(self, /) -> int: ...
     def mean(self, /) -> float: ...
     def variance(self, /) -> float: ...
@@ -17,9 +17,14 @@ class _PyNCHypergeometric:
 
 ###
 
-class _PyFishersNCHypergeometric(_PyNCHypergeometric): ...
-class _PyWalleniusNCHypergeometric(_PyNCHypergeometric): ...
+# NOTE: These apprear to be broken, and will always raise `TypeError: no default __reduce__ due to non-trivial __cinit__`
+def __setstate_cython__(self: Never, pyx_state: Never, /) -> None: ...  # undocumented
+def __reduce_cython__(self: Never, /) -> Never: ...  # undocumented
 
+class _PyFishersNCHypergeometric(_PyNCHypergeometric): ...  # undocumented
+class _PyWalleniusNCHypergeometric(_PyNCHypergeometric): ...  # undocumented
+
+# undocumented
 class _PyStochasticLib3:
     def Random(self, /) -> float: ...
     def SetAccuracy(self, /, accur: op.CanFloat) -> None: ...
@@ -46,6 +51,3 @@ class _PyStochasticLib3:
         size: op.CanInt,
         random_state: onp.random.RNG | None = None,
     ) -> onp.Array1D[np.float64]: ...
-
-def __setstate_cython__(self: object, pyx_state: object, /) -> None: ...
-def __reduce_cython__(self: object) -> None: ...