inotify: inotify.server.walkrepodirs() simplify walking
Do not 'yield tuple, boolean' to filter later on the boolean.
Test the boolean first, and yield tuple only if needed.
#!/bin/sh
hg init repo
cd repo
touch foo
hg ci -Am 'add foo'
hg up -C null
# this should be stored as a delta against rev 0
echo foo bar baz > foo
hg ci -Am 'add foo again'
hg debugindex .hg/store/data/foo.i