After I managed to wrangle the review text from the HTML it still needed this sort of cleanup:

    def clean_text(text):
        text = re.sub(r"[\x7f-\x9f]", "", text)  # remove control chars
        text = re.sub(r"[\xa0\r\t]+", " ", text)  # replace with spaces
        text = re.sub(r"\n+", "\n", text)  # squash runs of newlines
        text = re.sub(r"\s+", " ", text)  # squash runs of spaces
        # Remove newlines unless they appear to be at the end of a sentence
        # or if the sentence is shorter than 80 characters.
        text = re.sub(r"([^.?!\"\)])\n", r"\1 ", text)
        text = re.sub(r"\n([^\n]{,80})\n", r"\1 ", text)
        return text.strip()