tests/test-revlog-packentry

revert: don't assume ignored files will be returned in the unknown list

That's just an artifact of the current implementation, and I'll change
that soon.

Bonus points:
- we don't care about the unknown list at all
- we don't print an extra message if we try to revert a removed file
  that is not present in the target revision

#!/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