error: remove shortening of node in error message This strips the complete 20 bytes node which was not found. Having the the full node in error message is important as it makes debugging easier. If a short node is to be displayed, that should be done by callers. Differential Revision: https://phab.mercurial-scm.org/D9994

copies: filter out copies grafted from another branch Consider this simple history: ``` @ 3 modify y | o 2 copy x to y, modify x | | o 1 copy x to y, modify x |/ o 0 add x ``` If we now rebase commit 3 onto 1, Mercurial will look for copies between commit 2 and commit 1. It does that by going backwards from 2 to 0 and then forwards from 0 to 1. It will find that x was copied to y, since that was what happened on the path between them (namely in commit 1). That leads Mercurial to do a 3-way merge between y@3 and y@1 with x@2 as base. We want to use y@2 as base instead. That's also what happened until commit 1d6d1a15. This patch fixes the regression by adding another filtering step when chaining copies via a diffbase. The new filtering step removes copies that were the same between the two branches (same source and destination, but not necessarily the same contents). Differential Revision: https://phab.mercurial-scm.org/D10120

copies: inline _backwardrenames() in pathcopies() I'll add another filtering step in `patchcopies()` next. I need access to the forward copies for that. Differential Revision: https://phab.mercurial-scm.org/D10119

copies: extract function _backwardcopies() for reversing renames I'll add another callers in the next patch. Differential Revision: https://phab.mercurial-scm.org/D10118

tests: demonstrate how grafted copies are counted when tracing across branches This test demonstrates a regression from 1d6d1a15. Differential Revision: https://phab.mercurial-scm.org/D10117

typing: add some type annotations to mercurial/pathutil.py Differential Revision: https://phab.mercurial-scm.org/D10128

typing: add some type annotations to mercurial/util.py Differential Revision: https://phab.mercurial-scm.org/D10127

typing: add some type annotations to mercurial/phases.py Some of these were helpful in typing other modules, and then I typed the easy-ish ones. Black forces the long `Phasedefaults` definition to be wrapped, which pytype seems OK with (as shown with `reveal_type()`), but it does seem to confuse PyCharm a bit. Differential Revision: https://phab.mercurial-scm.org/D10126

typing: add type annotations to the public methods of mercurial/subrepoutil.py Differential Revision: https://phab.mercurial-scm.org/D10125

typing: add type annotations to mercurial/i18n.py I'm a little unsure of this because `gettext()` clearly allows for passing unicode. But the comments seem to indicate that this is related to tests, and this was useful for catching unicode being passed to `_()` in the keyring extension. I'm also not sure why `_(None)` would make any sense, so maybe the argument shouldn't be optional? I didn't add it to the lambda in plain mode because that spilled beyond 80 characters and so black mangled it. Black and pytype disagree on where the comment to disable a check needs to go, so this has to disable and then enable the checking. Differential Revision: https://phab.mercurial-scm.org/D10124