getrenamedfn: get copy data from context object if configured The function returned from getrenamedfn() calls filelog.renamed(). That won't work when storing copy metadata in the changeset. I've just switched to a simple implementation here. We may or may not need to optimize it later, possibly by optimizing the callers. No more tests fail with "--extra-config-opt experimental.copies.read-from=compatibility)" than they did before this patch. Differential Revision: https://phab.mercurial-scm.org/D6162

branchmap: implement __contains__() We have good occurences of `if branch in branchmap()` in our code. If __contains__() is not implemented then it will use __iter__() to find whether the element exists or not which is not good. I am bit confused that whether I should move existing callers to hasbranch() or this patch is a good way. Differential Revision: https://phab.mercurial-scm.org/D6206

branchmap: prevent using __getitem__() in branchheads() branchheads() can directly use self._entries instead. Differential Revision: https://phab.mercurial-scm.org/D6205

branchmap: dynamically resolve type of branchcache class This is required to support subclassing. Thanks to Yuya for suggesting this in D6151. Differential Revision: https://phab.mercurial-scm.org/D6204

copies: print list of divergent renames in sorted order The current order is not obvious to the user (and I may change it in a later patch). Lexicographical order seems like the obvious choice here. Differential Revision: https://phab.mercurial-scm.org/D6227

import: suppress accept: header irccloud and others may perform content negotation and reject (406) if the accept header does not match the mime type of the object

rebase: fix bug that prevented dry-run rebases from printing failures As far as I can tell it should be fine to unconditionally skip _prepareabortorcontinue if we're in the process of raising an Abort here. Differential Revision: https://phab.mercurial-scm.org/D6226

rebase: demonstrate bug in dry-run mode which causes cycles to not be reported Differential Revision: https://phab.mercurial-scm.org/D6225

test: minor cleanup to test-server-view.t While looking into adding error output in this test, I did some cleanup.

repoview: improve documentation for `repo.filtered` method I am sitting next to Joerg Sonnenberger and we are discussion his experience with repoview. This first effect of this discussion is this documentation clarification.

revset: short docstring for checkstatus This is where all the action happens for the status-related revsets, and a little documentation doesn't hurt.

discovery: stop direct use of attribute of partialdiscovery Instead of accessing `undecided` directly for ui display purposes, we introduce a `stats()` method that could be extended in the future with more interesting information. This is in preparation for a forthcoming Rust version of this object. Indeed, attributes and furthermore properties are a bit complicated for classes in native code. We could go further and rename `undecided` to mark it private, but `_undecided` is already taken as support for `_undecided` lazyness.