♻️ Rename parameter content_type to response_class (#183)

docs/src/custom_response/tutorial001.py

@@ -4,6 +4,6 @@ from starlette.responses import UJSONResponse
 app = FastAPI()
 
 
-@app.get("/items/", content_type=UJSONResponse)
+@app.get("/items/", response_class=UJSONResponse)
 async def read_items():
     return [{"item_id": "Foo"}]

docs/src/custom_response/tutorial002.py

@@ -4,7 +4,7 @@ from starlette.responses import HTMLResponse
 app = FastAPI()
 
 
-@app.get("/items/", content_type=HTMLResponse)
+@app.get("/items/", response_class=HTMLResponse)
 async def read_items():
     return """
     <html>

docs/src/custom_response/tutorial004.py

@@ -18,6 +18,6 @@ def generate_html_response():
     return HTMLResponse(content=html_content, status_code=200)
 
 
-@app.get("/items/", content_type=HTMLResponse)
+@app.get("/items/", response_class=HTMLResponse)
 async def read_items():
     return generate_html_response()