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rust-pyo3: change the name of the Python module to pyo3_rustext...

rust-pyo3: change the name of the Python module to pyo3_rustext Two reasons for doing so - `pyo3-rustext` is not a valid Python identifier, hence the module could only be imported with `__import__("mercurial.pyo3-rustext")` and then retrieved by getattr. Normal usage is throught `mercurial.policy`. Hovever manual testing for development and perhaps unit tests can benefit a more natural way of doing. - The module's `__name__` attribute was already `pyo3_rustext`. This can lead to some discrepancies, in particular when we introduce submodules.

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      # typelib.py - type hint aliases and support

      #

      # Copyright 2022 Matt Harbison <matt_harbison@yahoo.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      from __future__ import annotations

      import typing

      from typing import (

          Callable,

      )

      # Note: this is slightly different from pycompat.TYPE_CHECKING, as using

      # pycompat causes the BinaryIO_Proxy type to be resolved to ``object`` when

      # used as the base class during a pytype run.

      TYPE_CHECKING = typing.TYPE_CHECKING

      # The BinaryIO class provides empty methods, which at runtime means that

      # ``__getattr__`` on the proxy classes won't get called for the methods that

      # should delegate to the internal object.  So to avoid runtime changes because

      # of the required typing inheritance, just use BinaryIO when typechecking, and

      # ``object`` otherwise.

      if TYPE_CHECKING:

          from typing import (

              BinaryIO,

              Union,

          )

          from . import (

              node,

              posix,

              util,

              windows,

          )

          BinaryIO_Proxy = BinaryIO

          CacheStat = Union[

              posix.cachestat,

              windows.cachestat,

              util.uncacheable_cachestat,

          ]

          NodeConstants = node.sha1nodeconstants

      else:

          from typing import Any

          BinaryIO_Proxy = object

          CacheStat = Any

          NodeConstants = Any

      # scmutil.getuipathfn() related callback.

      UiPathFn = Callable[[bytes], bytes]

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				# typelib.py - type hint aliases and support
				#
				# Copyright 2022 Matt Harbison <matt_harbison@yahoo.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				from __future__ import annotations

				import typing

				from typing import (
				Callable,
				)

				# Note: this is slightly different from pycompat.TYPE_CHECKING, as using
				# pycompat causes the BinaryIO_Proxy type to be resolved to ``object`` when
				# used as the base class during a pytype run.
				TYPE_CHECKING = typing.TYPE_CHECKING


				# The BinaryIO class provides empty methods, which at runtime means that
				# ``__getattr__`` on the proxy classes won't get called for the methods that
				# should delegate to the internal object. So to avoid runtime changes because
				# of the required typing inheritance, just use BinaryIO when typechecking, and
				# ``object`` otherwise.
				if TYPE_CHECKING:
				from typing import (
				BinaryIO,
				Union,
				)

				from . import (
				node,
				posix,
				util,
				windows,
				)

				BinaryIO_Proxy = BinaryIO
				CacheStat = Union[
				posix.cachestat,
				windows.cachestat,
				util.uncacheable_cachestat,
				]
				NodeConstants = node.sha1nodeconstants
				else:
				from typing import Any

				BinaryIO_Proxy = object
				CacheStat = Any
				NodeConstants = Any

				# scmutil.getuipathfn() related callback.
				UiPathFn = Callable[[bytes], bytes]