def _format_simple_blocks(self, block_content: dict, block_type: str) -> str:
        """Format simple blocks like embed, bookmark, equation, divider."""
        if block_type in ["embed", "bookmark"]:
            url = block_content.get("url", "")
            caption = self._extract_rich_text_plain(block_content.get("caption", []))
            content = f"[{block_type.title()}]({url})"
            if caption:
                content += f"\n*{caption}*"
            return content
        elif block_type == "equation":
            expression = block_content.get("expression", "")
            return f"$$\n{expression}\n$$"
        elif block_type == "divider":
            return "---"
        else:
            return "**Table of Contents**"  # table_of_contents
Format simple blocks like embed, bookmark, equation, divider.
backend/airweave/platform/sources/notion.py