utils/style_doc.py/DocstringStyler/init_in_block
class DocstringStyler:    def init_in_block(self, text):
        lines = text.split("\n")
        while len(lines) > 0 and len(lines[0]) == 0:
            lines = lines[1:]
        if len(lines) == 0:
            return SpecialBlock.NOT_SPECIAL
        if re.search(r":\s*$", lines[0]):
            indent = get_indent(lines[0])
            if (
                len(lines) == 1
                or len(get_indent(lines[1])) > len(indent)
                or (len(get_indent(lines[1])) == len(indent) and re.search(r":\s*$", lines[1]))
            ):
                self.current_indent = indent
                return SpecialBlock.ARG_LIST
        return SpecialBlock.NOT_SPECIAL