def METHOD_NAME(dir=os.curdir):
    """
    Find all files under 'dir' and return the list of full filenames.
    Unless dir is '.', return full filenames with dir prepended.
    """
    files = _find_all_simple(dir)
    if dir == os.curdir:
        make_rel = functools.partial(os.path.relpath, start=dir)
        files = map(make_rel, files)
    return list(files)