tests/test-nested-repo.t

remotefilelog: fix {file_copies} template keyword

remotefilelog overrides templatekw.getrenamedfn(). I changed the
return type of that function in ec37df9042f9 (templatekw: make
getrenamed() return only filename, not nodeid, 2018-03-26). So we need
to change remotefilelog too. The function is used by the {file_copies}
template keyword and by `hg log --copies`.

Differential Revision: https://phab.mercurial-scm.org/D5576

  $ hg init a
  $ cd a
  $ hg init b
  $ echo x > b/x

Should print nothing:

  $ hg add b
  $ hg st

  $ echo y > b/y
  $ hg st

Should fail:

  $ hg st b/x
  abort: path 'b/x' is inside nested repo 'b'
  [255]
  $ hg add b/x
  abort: path 'b/x' is inside nested repo 'b'
  [255]

Should fail:

  $ hg add b b/x
  abort: path 'b/x' is inside nested repo 'b'
  [255]
  $ hg st

Should arguably print nothing:

  $ hg st b

  $ echo a > a
  $ hg ci -Ama a

Should fail:

  $ hg mv a b
  abort: path 'b/a' is inside nested repo 'b'
  [255]
  $ hg st

  $ cd ..