tests/test-revlog-packentry.t

verify: avoid spurious integrity warnings in verbose mode (issue6172)

The issue seems to revolve around renames in filtered commits, and only occurred
in verbose mode.  The problem occurs in the `# check renames` stage, around line
577.  Without using the unfiltered repo, this test would have printed:

    $ hg verify -v
    repository uses revlog format 1
    checking changesets
    checking manifests
    crosschecking files in changesets and manifests
    checking files
     foo@25: checking rename of 71ec0570c325: filtered revision '25'
     foobar@26: checking rename of 1b549296015b: filtered revision '26'
    checked 28 changesets with 16 changes to 11 files
    2 integrity errors encountered!
    (first damaged changeset appears to be 25)
    [1]

Differential Revision: https://phab.mercurial-scm.org/D7950

  $ hg init repo
  $ cd repo

  $ touch foo
  $ hg ci -Am 'add foo'
  adding foo

  $ hg up -C null
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

this should be stored as a delta against rev 0

  $ echo foo bar baz > foo
  $ hg ci -Am 'add foo again'
  adding foo
  created new head

  $ hg debugindex foo
     rev linkrev nodeid       p1           p2
       0       0 b80de5d13875 000000000000 000000000000
       1       1 0376abec49b8 000000000000 000000000000

  $ cd ..