Fastapi: Wrong example code in tutorial doc

[ponty33]

First check

• [x] I added a very descriptive title to this issue.
• [x] I used the GitHub search to find a similar issue and didn't find it.
• [x] I searched the FastAPI documentation, with the integrated search.
• [x] I already searched in Google "How to X in FastAPI" and didn't find any information.
• [x] I already read and followed all the tutorial in the docs and didn't find an answer.
• [x] I already checked if it is not related to FastAPI but to Pydantic.
• [x] I already checked if it is not related to FastAPI but to Swagger UI.
• [x] I already checked if it is not related to FastAPI but to ReDoc.
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Description

The example code in Using lists instead of sets section of Response Model page seems to be the same as previous section response_model_include and response_model_exclude.
It doesn't demostrate the section's description about convert list to set.

Environment

Irrelevant

[ycd]

The point is very clear actually.

If you forget to use a set and use a list or tuple instead, FastAPI will still convert it to a set and it will work correctly

So in the Using lists instead of sets section, @tiangolo uses Lists instead of sets to demonstrate it does not make any difference. But in the first example, we have a set.

[ponty33]

@ycd Oh, I totally missed that! Thanks!