mail: mbox handling as a part of mail handling, refactored from patchbomb
basic test for hg debugrebuildstate $ hg init repo $ cd repo $ touch foo bar $ hg ci -Am 'add foo bar' adding bar adding foo $ touch baz $ hg add baz $ hg rm bar $ hg debugrebuildstatestate dump after $ hg debugstate --nodates | sort n 644 -1 bar n 644 -1 foostatus $ hg st -A ! bar ? baz C foo