actions: rename DEFICIENCY constant to FORMAT_VARIANT It was not obvious what does deficieny means and every format change can't be a deficiency. There are some format changes like compression levels, share-safe which can't be understood at deficiencies. This patch renames the constant to make things clearer. Differential Revision: https://phab.mercurial-scm.org/D9664

upgrade: rename finddeficiences() to find_format_upgrades() It was not obvious what does deficieny means and every format upgrade can't be a deficiency. There are some format upgrades like compression levels, share-safe which can't be understood at deficiencies. A change can be an upgrade or downgrade, however this `finddeficiences()` only used to find upgrades. This patch renames the function and related variables to make things more clearer. The ui message also got improved which is a good thing. Next patch will rename deficiency in general across the upgrade code. Differential Revision: https://phab.mercurial-scm.org/D9582

beautifygraph: change the current commit symbol The existing "circle with vertical fill" character renders as full width in many terminals making the beautified symbols have uneven size. Additionally, the proposed "fisheye" character is the logic 'active' version of the current merge symbol, "bullseye." Differential Revision: https://phab.mercurial-scm.org/D9678

merge with stable

statichttprepo: explicitly convert error message to str (issue6247) For Python 2.7, the implicit conversion of the HTTPError instance to str was good enough. For Python 3.x, this fails later when hitting the str to bytes conversion logic. Differential Revision: https://phab.mercurial-scm.org/D9661

debugsetparents: add various warning in the help message I am tired to see people shooting themself in the foot with this. So lets add more warning. At that point we should probably rename it or add extra confirmation flag. This is a debug command anyway we can break BC on it. Differential Revision: https://phab.mercurial-scm.org/D9534

largefiles: redo heads interception The largefiles extension replaces the "heads" wire command and tries to redirect all uses towards the custom "lheads" wire command. As seen in issue6384, this doesn't currently work for ssh. Instead of hooking into the _callstream interface, properly register the command for the peer instance and monkeypatch the executor to do the redirection. This works transparently for both all kinds of peers and both for the batch and non-batch case. Differential Revision: https://phab.mercurial-scm.org/D9663

nodemap: match comment to actual code REV_OFFSET constant is 2, not 10. Differential Revision: https://phab.mercurial-scm.org/D9688

clone: update to active bookmark, if set This cannot happen during a normal Mercurial clone, but is useful for extensions like hg-git where we know what to check out — the Git HEAD — but do not wish to track it later on using the `@` bookmark. Test Plan: I have not included an explicit test, as this is much more easily tested within the `hg-git` test suite. Differential Revision: https://phab.mercurial-scm.org/D9638

branchmap: micro-optimize branchinfo changelogrevision() is supposed to be used if not all data of changelog.read is used. This is the case here as only the extra field is used. This also improves extensibility as at least hgext.git doesn't implement changelog.read. Differential Revision: https://phab.mercurial-scm.org/D9626

contrib: py3 compat for perfnodemap Differential Revision: https://phab.mercurial-scm.org/D9687

comments: fix typos Differential Revision: https://phab.mercurial-scm.org/D9689