Comment 3 for bug 406113

I'm updating this branch and you now get something like this:

[0] mbp@grace% ./bzr st
modified:
  bzrlib/commands.py
  bzrlib/osutils.py
unknown:
  tmp.diff
  bzrlib/tmp.diff
/home/mbp/bzr/406113-extension-warnings/bzrlib/osutils.py:928: UserWarning: bzr: warning: Failed to load compiled extensions:
    No module named _chunks_to_lines_pyx
    cannot import name _btree_serializer_pyx
    No module named _rio_pyx
    No module named _bencode_pyx
    No module named _dirstate_helpers_pyx
    No module named _chk_map_pyx
    No module named _annotator_pyx
    No module named _known_graph_pyx
    No module named _knit_load_data_pyx
    No module named _groupcompress_pyx
    No module named _readdir_pyx
    Bazaar can run, but performance may be reduced.
    Check Bazaar is correctly installed or set ignore_missing_extensions
  % '\n '.join(_extension_load_failures,))

in some ways we should just give the module name, but it's possible that the error message will be of interest.