rebase: turn off inmemory flag on --stop Guessing from the inline comment, "in-memory rebase is not compatible with resuming rebases", in-memory rebasing should be disabled.

rebase: use action variable to select things to do

rebase: consolidate check for --dry-run/--confirm on abort/stop/continue

rebase: consolidate check for --abort/--stop/--continue conflicts

rebase: do not set internal dryrun flag by --confirm This prepares for cleaning up option checking.

rebase: add test to show --stop moves bookmarks Added tests to show that --stop option moves bookmarks of rebased csets to their succs. Differential Revision: https://phab.mercurial-scm.org/D3982

rebase: include --stop option in documentation Differential Revision: https://phab.mercurial-scm.org/D3970

rebase: raise error for options conflicting with --stop Make sure --stop feature raise error for conflicting options --continue, --abort, --confirm, --dry-run. Tests are added to reflect the same. Differential Revision: https://phab.mercurial-scm.org/D3969

rebase: add --stop option to stop rebase at any point (issue5206) Before this patch, during a rebase if you get a point where you can't figure out what to do next, then either you had to complete your series or abandon all the work you have done during this rebase. Now, with this feature you can stop at any point by keeping the rebased csets and mark original csets as obsolete. And if you don't have evolution extension enabled then you can use --keep option as an alternative which will keep original csets too, instead of marking them obsolete. Differential Revision: https://phab.mercurial-scm.org/D3959

statprof: cleanup string construction Use string substitutions instead of string additions.