merge with mainline.

deprecate undo command, replace with rollback command.

fix test-help output.

notify: add 'to' header to message.

notify extension: generate right number of diffs

Update tests for revlogng

Use revlogng and inlined data files by default This changes revlog specify revlogng by default. Inlined data files are also used unless a flags option is found in the .hgrc. Some example hgrc files: [revlog] # use the original revlog format format=0 [revlog] # use revlogng. Because no flags are included, inlined data files # also be selected format=1 [revlog] # use revlogng but do not inline the data files with the index flags= [revlog] # the new default format=1 flags=inline

reverse sense of return value from python hooks. old scheme (False/None/0/'' == fail) made coding style unnatural, did not allow use of mercurial commands as hooks. new scheme (False/None/0 == pass) is pythonic, does not require peculiar "return True" at ends of hooks, allows hooks like this: [hooks] # update working dir after push into this repo changegroup.update = python:mercurial.commands.update

add filename to IOError if read of file fails. if file replaced with directory or symlink, IOError not fully filled out.

merge with crew.