typing: (mostly) align the signatures of `imanifestrevisionstored` overrides...
typing: (mostly) align the signatures of `imanifestrevisionstored` overrides
When we change the implementations to subclass this explicitly, pytype complains
that the signatures mismatch for various methods. It seems hung up on ones in
`mercurial.manifest` that have type hints on the return value, but lacked it in
the Protocol class (which it thinks returns `None` if there's no annotation).
The tricky part is that a lot of the return types in the `mercurial.manifest`
module are custom types specific to that module (e.g. `'manifestctx' | 'treemanifestctx'`).
Those should probably be replaced with Protocol classes.
I was going to avoid making a long series longer by disabling that check for now
by putting `Any` as the return type on the Protocol class methods, and then
realized the problem is the class isn't marked as a Protocol (that property isn't
inherited). For now, lock in the synchronized signatures.
