rename util.is_exec to isexec

posix: delete unused expand_glob

rename util.find_exe to findexe

revlog: support writing generaldelta revlogs With generaldelta switched on, deltas are always computed against the first parent when adding revisions. This is done regardless of what revision the incoming bundle, if any, is deltaed against. The exact delta building strategy is subject to change, but this will not affect compatibility. Generaldelta is switched off by default.

cmdutil: fix errors reported by pyflakes test

merge with stable

check-code: complain about set.isdisjoint

fix bookmarks rollback behavior Before this patch undo.bookmarks was created on bookmarks write and not with other transaction-related files. There were two issues: first is that if you have changed bookmarks few times after a transaction happened, rollback will give you a state which can point to non-existing revision. Second is that if you have not changed bookmarks after a transaction, rollback will touch your state anyway. This change also adds `localrepo._writejournal` method, which can be used by other extensions to save their transaction-related backup in right time.

add positional arguments to non-shell aliases

run-tests: take the basepath when constructing the test temp dir so it's possible to run tests that are outside the test/ dir