README

test-largefiles: fix test failing on vfat file systems

The usercache hardlinks files for filesystems that support hardlinks. So when
this test is run on a filesystem that supports hardlinking, we have a link
in r7 and in the usercache, pointing to the same file contents (4cdac4d8...).

vfat does not support hardlinks, the file in the cache and in the store of
r7 are thus independent.

For the test to pass on vfat, we need to corrupt *both* the largefile in the
usercache and in the store of r7. Corrupting only one of them is not sufficient.

Fixes:

  --- /home/buildslave/mercurial/vfat_hg_tests__stable_/build/tests/test-largefiles.t
  +++ /home/buildslave/mercurial/vfat_hg_tests__stable_/build/tests/test-largefiles.t.err
  @@ -997,9 +997,11 @@
     $ hg push -R r7 http://localhost:$HGPORT1
     pushing to http://localhost:$HGPORT1/
     searching for changes
  -  remote: largefiles: failed to put 4cdac4d8b084d0b599525cf732437fb337d422a8 into store: largefile contents do not match hash
  -  abort: remotestore: could not put $TESTTMP/r7/.hg/largefiles/4cdac4d8b084d0b599525cf732437fb337d422a8 to remote store http://localhost:$HGPORT1/ (glob)
  -  [255]
  +  searching for changes
  +  remote: adding changesets
  +  remote: adding manifests
  +  remote: adding file changes
  +  remote: added 2 changesets with 2 changes to 2 files
     $ rm -rf empty

   Push a largefiles repository to a served empty repository

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