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typing: add type hints to the `opener` attributes and arguments of revlog...

typing: add type hints to the `opener` attributes and arguments of revlog When making revlog and filelog classes visible to pytype, it got confused quite a bit in `mercurial/revlogutils/rewrite.py`, thinking it had a plain `Callable`, and flagging additional methods on it like `join()` and `rename()`. I couldn't figure out how it reduced to that (and PyCharm flagged `opener` references as `Any`), but this makes it happy. So make this change before making the classes visible. The vfs class hierarchy is a bit wonky (e.g. `filteredvfs` is not a `vfs`), so this may need to be revisited with a Protocol class that covers all of the `vfs` classes. But for now, everything works.

Matt Harbison - - Load All Authors

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      from typing import (

          AnyStr,

          IO,

          List,

          Optional,

          Sequence,

      )

      version: int

      class stat:

          st_dev: int

          st_mode: int

          st_nlink: int

          st_size: int

          st_mtime: int

          st_ctime: int

      def listdir(path: bytes, st: bool, skip: Optional[bool]) -> List[stat]: ...

      def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...

      def statfiles(names: Sequence[bytes]) -> List[stat]: ...

      def setprocname(name: bytes) -> None: ...

      def getfstype(path: bytes) -> bytes: ...

      def getfsmountpoint(path: bytes) -> bytes: ...

      def unblocksignal(sig: int) -> None: ...

      def isgui() -> bool: ...

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				from typing import (
				AnyStr,
				IO,
				List,
				Optional,
				Sequence,
				)

				version: int

				class stat:
				st_dev: int
				st_mode: int
				st_nlink: int
				st_size: int
				st_mtime: int
				st_ctime: int

				def listdir(path: bytes, st: bool, skip: Optional[bool]) -> List[stat]: ...
				def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...
				def statfiles(names: Sequence[bytes]) -> List[stat]: ...
				def setprocname(name: bytes) -> None: ...
				def getfstype(path: bytes) -> bytes: ...
				def getfsmountpoint(path: bytes) -> bytes: ...
				def unblocksignal(sig: int) -> None: ...
				def isgui() -> bool: ...