It looks like you are missing a parenthesis after `join`. Here's what your corrected code would look like:

```Python
# Use difflib to show the changes to verify type annotations were added as expected.
import difflib

def printdiff(original_node, updated_node):
    return (
        "".join(
            difflib.unified_diff(original_node.splitlines(1), updated_node.splitlines(1))
        )
    )
```
ดูเหมือนว่าคุณจะไม่มีวงเล็บหลังจาก "เข้าร่วม" โค้ดที่แก้ไขแล้วของคุณจะมีลักษณะดังนี้: ```Python # Use difflib to show the changes to review type annotations has added as Expected. นำเข้า difflib def printdiff (Original_node, อัปเดต_โหนด): กลับ ( "". เข้าร่วม ( difflib.unified_diff (Original_node.splitlines (1), อัปเดต_node.splitlines (1)) ) ) ```
spam fails_task pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence