store: Removed extra space in _data list

verify: fix "missing revlog!" errors for revlog format v0 and add test With revlog format v0 the .d files are empty if the only revision stored is an empty file. Since Mercurial can no longer create format v0 repositories, but still use it, add a script which creates a repository with a single empty file. This can be used in other tests if wanted.

zsh completion: bookmarks support

zsh completion: patchbomb support

diff: recurse into subrepositories with --subrepos/-S flag

status: recurse into subrepositories with --subrepos/-S flag

match: add narrowmatcher class This class can be used to adapt an existing match object to a new match object that only cares about paths within a certain subdirectory.

cmdutil: use repo.auditor when constructing match object This gives the repository control over which nested repository paths that should be allowed via the custom path auditor. Since paths into subrepositories are now allowed, dirstate.walk must now filter away more paths than before.

match: accept auditor argument This is used when normalizing filenames and patterns.

localrepo: add auditor attribute which knows about subrepos