convert: add missing numcommits() override to hg sources Otherwise, the progressbar in converter.walktree() gets None as its total during the initial scan. (Though that seems harmless, and there are other foreign vcs sources without this.)

testrunner: make `-j100 --runs-per-test=100 test-foo.t` use 100 jobs It would use only 1 job since 1039404c5e1d (run-tests: print number of tests and parallel process count, 2018-10-13), but I'm pretty sure that was unintentional. Differential Revision: https://phab.mercurial-scm.org/D5557

narrow: use merge.ACTION_GET instead of duplicating 'g' constant As suggested by Yuya. Differential Revision: https://phab.mercurial-scm.org/D5512

narrow: drop explicit dirstate write The dirstate is written when the wlock is released, so we don't need to write it explicitly in updateworkingcopy(). I don't know why I put it there in the first place (tests pass without it even in the commit that introduced it). Differential Revision: https://phab.mercurial-scm.org/D5515

histedit: fix --continue and --abort when curses is enabled I overlooked this when I did the initial import. Differential Revision: https://phab.mercurial-scm.org/D5540

graft: abort if --date/user specified with --currentdate/currentuser (BC) They are conflicting options. Let's explicitly ban such combination. Note that this means you need "--no-currentdate --date" to override --currentdate specified in aliases/defaults.

amend: turn currentdate into tri-state bool so config option can be negated Otherwise, rewrite.update-timestap couldn't be overridden by --no-currentdate. FWIW, which do we like? --no-currentdate vs --no-current-date. If the latter is preferred, maybe we can add "graft --current-date" and deprecate "--currentdate".

discovery: improve partial discovery documentation The older documentation could be improved.

discovery: add a simple `addinfo` method The method can directly process a sample result. This makes the main code simpler to follow.

discovery: move missing tracking inside the partialdiscovery object This is the final set that we need to track to have a fully up to date information within the object.