fix: determine fixer tool failure by exit code instead of stderr This seems like the more natural thing, and it probably should have been this way to beign with. It is more flexible because it allows tools to emit diagnostic information while also modifying a file. An example would be an automatic code formatter that also prints any remaining lint issues. Differential Revision: https://phab.mercurial-scm.org/D4158

status: advertise --abort instead of 'update -C .' to abort graft Recent release got us a --abort flag for 'hg graft' command which is nice UI and we should advertise that to stop the graft instead of 'update -C .' which is kind of ugly. Differential Revision: https://phab.mercurial-scm.org/D4169

status: advertise --abort instead of 'update -C .' to abort a merge status has a part where it shows the conflict information and how to continue or abort. Couple of release ago, we got merge --abort and we should advertise that instead of 'hg update -C .' which is kind of ugly. I know we need to unify the logic here. Differential Revision: https://phab.mercurial-scm.org/D4168

narrow: add '()' to ellipsis in the revset help ellipsis is a revset function and was missing () after it's name in the help text. This might confuse users as they try `hg log -r 'ellipsis'`. Differential Revision: https://phab.mercurial-scm.org/D4167

tests: make all the string constants in test-match.py be bytes Done with python3 contrib/byteify-strings.py tests/test-match.py -i # skip-blame just bytes prefixes Differential Revision: https://phab.mercurial-scm.org/D4171

linelog: fix bytes/str issue in exception raise on Python 3 Differential Revision: https://phab.mercurial-scm.org/D4170

absorb: following UI conventions https://www.mercurial-scm.org/wiki/UIGuideline#adding_new_options