black's other line split methods have been exhausted, this line (or one of the resulting lines after all line splits are performed) would still be over the line_length limit unless we split this string. AND * The target string is NOT a "pointless" string (i.e. a string that has no parent or siblings). AND * The target string is not followed by an inline comment that appears to be a pragma. AND * The target string is not a multiline (i.e. triple-quote) string. Ú