if '\n#, fuzzy' in raw_chunk:  # might be like "#, fuzzy, python-format"

            continue  # drop crazy auto translation that is worse than useless

        # strip all comment lines from chunk

        chunk_lines = [

            line

            for line in raw_chunk.splitlines()

            if line

            and not line.startswith('#')

        ]

        if not chunk_lines:

            continue

        # check lines starting from first msgstr, skip chunk if no translation lines

        msgstr_i = [i for i, line in enumerate(chunk_lines) if line.startswith('msgstr')]

        if (

            chunk_lines[0].startswith('msgid') and

            msgstr_i and

            all(line.endswith(' ""') for line in chunk_lines[msgstr_i[0]:])

        ):  # skip translation chunks that doesn't have any actual translations

            continue

        chunks.append('\n'.join(chunk_lines) + '\n')

    return '\n'.join(chunks)

def _normalize_po_file(po_file, merge_pot_file=None, strip=False):

    if merge_pot_file:

                '--update', po_file, '-q', merge_pot_file])

    if strip:

        po_tmp = po_file + '.tmp'

        with open(po_file, 'r') as src, open(po_tmp, 'w') as dest:

            raw_content = src.read()

            normalized_content = _normalize_po(raw_content)

            dest.write(normalized_content)

        os.rename(po_tmp, po_file)

def _normalized_diff(file1, file2, merge_pot_file=None, strip=False):

    # Create temporary copies of both files

    temp1 = tempfile.NamedTemporaryFile(prefix=os.path.basename(file1))

    temp2 = tempfile.NamedTemporaryFile(prefix=os.path.basename(file2))

    debug('normalized_diff: %s -> %s / %s -> %s' % (file1, temp1.name, file2, temp2.name))

    shutil.copyfile(file1, temp1.name)

    shutil.copyfile(file2, temp2.name)

    # Normalize them in place

    _normalize_po_file(temp1.name, merge_pot_file=merge_pot_file, strip=strip)

    _normalize_po_file(temp2.name, merge_pot_file=merge_pot_file, strip=strip)

    # Now compare

    try:

        runcmd(['diff', '-u', temp1.name, temp2.name])

    except subprocess.CalledProcessError as e:

        return e.returncode