Sync fastapi docs from 50fa3f7c on 2026-01-11

docs_src/custom_response/tutorial006c_py39.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+from fastapi.responses import RedirectResponse
+
+app = FastAPI()
+
+
+@app.get("/pydantic", response_class=RedirectResponse, status_code=302)
+async def redirect_pydantic():
+    return "https://docs.pydantic.dev/"