dirstate-item: introduce a `maybe_clean` property It is useful for some extension that seek to invalidate some state. Differential Revision: https://phab.mercurial-scm.org/D11523

dirstate: add a `get_entry` method to the dirstate This method give access to the underlying `DirstateEntry` object (or an empty one if None was there). It should allow us to use the more semantic property of the entry instead of the state where we needs it. Differential Revision: https://phab.mercurial-scm.org/D11522

dirstate-item: Make constructor parameters optional … in the C implementation of DirstateItem, like they already were in the Python and Rust ones. Differential Revision: https://phab.mercurial-scm.org/D11521

hg-core: silence dead-code warning by adding RevlogEntry::revion() accessor Nightly `rustc` warns about the `RevlogEntry::rev` field not being used. Rather than removing it, I added an accessor since it seems useful to be able to get the entry's revision. Differential Revision: https://phab.mercurial-scm.org/D11548

rust: remove dead code Differential Revision: https://phab.mercurial-scm.org/D11549

Added signature for changeset 750920b18aaa

Added tag 5.9.2 for changeset 750920b18aaa

rust-revset: support explicit `.` revision This is basically the same thing as not specifying a revision, except this is done in the revset resolution function. This allows calls like `rhg cat some-file -r .` to work without falling back. Differential Revision: https://phab.mercurial-scm.org/D11402

rust-revset: add separate match logic for shortcuts The next change will add a shortcut for the `.` revision. One day we might start matching `tip` and others, so this is an easy refactor. Differential Revision: https://phab.mercurial-scm.org/D11401

rhg: fall back if subrepos are detected We do not handle subrepos yet, the addition of the support for `-r .` will break if we don't fall back. Differential Revision: https://phab.mercurial-scm.org/D11403