📝 Remove *, from functions where it's not needed #1234 (#1239)

* Fix for - [FEATURE] Remove *, where it's not needed #1234

* 🔥 Remove unnecessary arg *,

* 🎨 Update docs format highlight lines

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

docs_src/schema_extra_example/tutorial002.py

@@ -12,6 +12,6 @@ class Item(BaseModel):
 
 
 @app.put("/items/{item_id}")
-async def update_item(*, item_id: int, item: Item):
+async def update_item(item_id: int, item: Item):
     results = {"item_id": item_id, "item": item}
     return results