absorb: make `--edit-lines` imply `--apply-changes` One of our users tried to use `hg absorb -e` but it seemed that it would only bring up the editor if there were no changes the command could automatically detect destination for. I spent probably half an hour debugging why it worked that way. I finally figured out that it does bring up the editor, but you have to answer "yes" to the "apply changes" prompt *first*. That seems very unintuitive. If the user wants to edit the changes, there seems to be little reason to present them with a prompt first, so let's have `-e/--edit-lines` imply `-a/--apply-changes`. All the tests using `-e` also already used `-a`. I changed them to rely on the implied `-a` so we get coverage of that. Differential Revision: https://phab.mercurial-scm.org/D12550

branchmap: add a test that shows bad interaction with strip Differential Revision: https://phab.mercurial-scm.org/D12549

rhg: refactor to pass argv down, instead of caling args_os() This refactoring makes it easy to patch some command-line preprocessing into rhg. We use this to support using rhg as a shebang interpreter, for example. Differential Revision: https://phab.mercurial-scm.org/D12543

narrow: support debugupgraderepo Differential Revision: https://phab.mercurial-scm.org/D12542