Examples is never formatted correctly

This example is never formatted correctly

from typing import Union

from pydantic_ai import RunContext, Tool
from pydantic_ai.tools import ToolDefinition

async def only_if_42(
    ctx: RunContext[int], tool_def: ToolDefinition
) -> Union[ToolDefinition, None]:
    if ctx.deps == 42:
        return tool_def

def hitchhiker(ctx: RunContext[int], answer: str) -> str:
    return f'{ctx.deps} {answer}'

hitchhiker = Tool(hitchhiker, prepare=only_if_42)

Because ruff and black disagree.

Black error:

ruff failed:
  pydantic_ai_slim/pydantic_ai/tools.py:103:1: I001 [*] Import block is un-sorted or un-formatted
    |
  1 | / from typing import Union
  2 | | 
  3 | | from pydantic_ai import RunContext, Tool
  4 | | from pydantic_ai.tools import ToolDefinition
  5 | | 
  6 | | async def only_if_42(
    | |_^ I001
  7 |       ctx: RunContext[int], tool_def: ToolDefinition
  8 |   ) -> Union[ToolDefinition, None]:
    |
    = help: Organize imports

  Found 1 error.
  [*] 1 fixable with the `--fix` option.

Start with the embedded Python example and the reported pydantic_ai_slim/pydantic_ai/tools.py:103:1 location, then run the repository's formatting checks to reproduce the Ruff import-order failure. Identify why the example is transformed into that file and make the formatting tools agree; done means the example passes both formatting checks.