bookmarks: update and updatecurrentbookmark return status This makes bookmarks.update() and bookmarks.updatecurrentbookmark() return True or False to indicate whether the bookmark was updated or not. This allows callers to e.g. abort if the update failed.

bookmarks: clarify help for use of merge and update

merge: make 'nothing to merge' aborts consistent Makes the 'nothing to merge' abort messages in commands.py consistent with those in merge.py. Also makes commands.merge() and merge.update() use hints. The tests show the changes.

merge: remove excess creation of changectx

largefiles: optimize performance of status on largefiles repos (issue3136)

Describe all files related to the standard commands.