Generically formats all remaining docstrings and custom XML
    tags that don't appear in the list of already printed documentation.

    :arg printed: a list of XML tags for the element that have already
      been handled by a higher method.

def _format_generic(lines, element, printed, spacer=""):
    """Generically formats all remaining docstrings and custom XML
    tags that don't appear in the list of already printed documentation.

    :arg printed: a list of XML tags for the element that have already
      been handled by a higher method.
    """
    for doc in element.docstring:
        if doc.doctype.lower() not in printed:
            lines.append(spacer + doc.__str__())