path: unify path creation in `get_pull_paths` This remove a special case and will make it possible to return `path` instance directly. Differential Revision: https://phab.mercurial-scm.org/D11672

path: add a new argument to control path validation During pull, unvalidated path might be used, having the option to do so directly will allow use to simplify some code and unlock more `path` usage later in the series. Differential Revision: https://phab.mercurial-scm.org/D11671

rhg: internally, return a structured representation from hg cat The purpose of this change is to make it possible to support limited templating in `hg cat`, so we could print separators between files etc. The templating itself is not implemented yet, so this functionality is unused in `rhg cat`. However, in our fork of hg we're implementing a slightly different command `hg jscat` which makes use of this. So accepting this change will let us minimize the size of the patch we're maintaining on our side. Differential Revision: https://phab.mercurial-scm.org/D11679

rhg: fix `hg cat` interaction with null revision Differential Revision: https://phab.mercurial-scm.org/D11664

dirstate-v2: add an option to prevent unintentional slow dirstate-v2 This is the project policy discussed in November 2020 and already put to use for the persistent nodemap. Differential Revision: https://phab.mercurial-scm.org/D11668

rhg: fix formatting error reported by test-check-format-rust.t Differential Revision: https://phab.mercurial-scm.org/D11670