There is a extra parenthesis at the end of the return statement, which is causing a syntax error. The correct code would be:
```import difflib

def printdiff(original_node, updated_node):
    return "".join(difflib.unified_diff(original_node.splitlines(1), updated_node.splitlines(1)))
```
spam fails_task pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence