📝 Update includes in `docs/en/docs/tutorial/request-forms.md` (#12648)

Co-authored-by: Sebastián Ramírez <[email protected]>

docs/en/docs/tutorial/request-forms.md

@@ -18,69 +18,13 @@ $ pip install python-multipart
 
 Import `Form` from `fastapi`:
 
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+{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[3] *}
 
 ## Define `Form` parameters
 
 Create form parameters the same way you would for `Body` or `Query`:
 
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-```Python hl_lines="7"
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+{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[9] *}
 
 For example, in one of the ways the OAuth2 specification can be used (called "password flow") it is required to send a `username` and `password` as form fields.