dirstate-tree: Extract into a method sorting children of a given node A later changset will use this in another place. This is an associated function (that Python would call static method) instead of a free function so it doesn’t need to be imported separately. It’s on `Node` rather than `ChildNodes` because the latter is a type alias to an external type (`HashMap`) so that would require an extension trait which needs to be imported separately. Differential Revision: https://phab.mercurial-scm.org/D10721

dirstate-v2: Add a variant of some tests, that uses the new format With this, the new format receives some testing every time someone runs tests with Rust extensions enabled, including on CI. Differential Revision: https://phab.mercurial-scm.org/D10720

dirstate-v2: Change the on-disk format when the requirement is enabled For now, the format is the same except with an additional marker at the start. This marker is redundant: for existing repositories it is `.hg/requires` that determines which format to use. For new repositories, it is the new `format.exp-dirstate-v2` config. There is no upgrade or downgrade so far. Most of the changes are about plumbing a boolean through layers of APIs to indicate which format should be used. Differential Revision: https://phab.mercurial-scm.org/D10719

dirstate-v2: Update the expected output of some tests for new requirement Fix most test failures (except in test-narrow-debugrebuilddirstate.t and test-upgrade-repo.t) caused by the new entry in config or in .hg/requires when running `run-tests.py --extra-config-opt format.exp-dirstate-v2=1` There is no CI so far for this configuration. Differential Revision: https://phab.mercurial-scm.org/D10718

tests: More cleanly separate expected hexdump output There are more lines that differ than are in common, and dirstate-v2 will complicate that further. Differential Revision: https://phab.mercurial-scm.org/D10717

dirstate-v2: Add a new experimental `exp-dirstate-v2` repository requirement This requirement is added to `.hg/requires` when creating a new repository if Rust extensions are enabled and the `format.exp-dirstate-v2` config is set. Nothing yet changes based on this requirement, but its mere presence affects some tests (for example if they print `.hg/requires`). The next two changesets update tests’ expected outputs accordingly. There is no CI so far that enables this configuration. Differential Revision: https://phab.mercurial-scm.org/D10716

urlutil: provide some information about "bad url" when processing `pushurl` It appears pushurl only support `<proto>://` entries. This is not obvious and can lead to obscure error. We make the error less obscure as a start.. Differential Revision: https://phab.mercurial-scm.org/D10455

revset: document the `outgoing` behavior if the path resolve to multiple urls Differential Revision: https://phab.mercurial-scm.org/D10454

multi-urls: document the feature We have a feature lets make it visible to people. Differential Revision: https://phab.mercurial-scm.org/D10453

multi-urls: add a boolean suboption that unlock path specification as list When this option is set, a list of patch can be specifed as value for `[paths]` entries. For the command who support it, this behave the same as providing multiple destination of the command line. Differential Revision: https://phab.mercurial-scm.org/D10452