bookmarks: primarily use repo lock, not wlock Bookmarks are repository data, not working directory data. Only the current bookmark is working directory data. Some lock shuffling is required to avoid lockout between the initial mock lock and locking of the localrepo instance that is created after copying.

localrepo: update branchcache in a more reliable way test-mq-cache.t did apparently look at stale cache content. Testing with different locking mechanism happened to update the cache more frequently and thus caused a test failure.

tests: make qnew in test-mq-caches.t stable The unstable hashes did for other reasons not show up in the test output.

localrepo: remove spurious updatebranchcache return value - it was left over from the refactoring in d01e28657429.

mq: only save dirty files once when savedirty is called multiple times

mq: remove early wlock release in qnew It seems like something that missed the refactoring in 97b734fb9c6f.

mq: use .invalidate to cancel dirty mq state when cancelling transaction Before the code optimistically relied on savedirty not being called a cancelled transaction. If it was called it could save incorrect data. Instead we now start using the invalidate method introduced in b169ba60eebe.