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rust: Add type annotation to fix inference on Rust Nightly...

rust: Add type annotation to fix inference on Rust Nightly When compiling with Rust Nightly, the im-rs crate silently makes use of the experimental language feature for trait impl specialization. This apperently changes public its APIs in subtle ways such that type inference of some user code can fail where it succeeds when specialization is disabled. This made Mercurial’s Rust unit tests have compilation errors on Nightly. I have not managed to find the exactl root cause, but I wrote down my findings so far at https://github.com/bodil/im-rs/issues/188 This adds type annotation to make unit tests rely less on type inference and work around the issue. Differential Revision: https://phab.mercurial-scm.org/D10742

Gregory Szorc - - Load All Authors

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      from typing import (

          List,

          Tuple,

      )

      version: int

      def bdiff(a: bytes, b: bytes): bytes

      def blocks(a: bytes, b: bytes) -> List[Tuple[int, int, int, int]]: ...

      def fixws(s: bytes, allws: bool) -> bytes: ...

      def splitnewlines(text: bytes) -> List[bytes]: ...

      def xdiffblocks(a: bytes, b: bytes) -> List[Tuple[int, int, int, int]]: ...

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				from typing import (
				List,
				Tuple,
				)

				version: int

				def bdiff(a: bytes, b: bytes): bytes
				def blocks(a: bytes, b: bytes) -> List[Tuple[int, int, int, int]]: ...
				def fixws(s: bytes, allws: bool) -> bytes: ...
				def splitnewlines(text: bytes) -> List[bytes]: ...
				def xdiffblocks(a: bytes, b: bytes) -> List[Tuple[int, int, int, int]]: ...