Fix typo

app.py

@@ -274,15 +274,15 @@ async def create_classroom(payload: ClassroomRequest = Body(...)):
         """
     raw = gemini_flash_completion(prompt).strip()
 
-# ---------- Attempt to parse JSON ----------
-try:
-    timetable_json = json.loads(raw)
-except json.JSONDecodeError:
-    logger.warning("Gemini returned invalid JSON; sending raw text.")
-    return JSONResponse(content={"classroom_id": payload.id, "timetable_raw": raw})
-# Ensure id is echoed (fallback if model forgot)
-timetable_json["classroom_id"] = payload.id
-return JSONResponse(content=timetable_json)
+    # ---------- Attempt to parse JSON ----------
+    try:
+        timetable_json = json.loads(raw)
+    except json.JSONDecodeError:
+        logger.warning("Gemini returned invalid JSON; sending raw text.")
+        return JSONResponse(content={"classroom_id": payload.id, "timetable_raw": raw})
+    # Ensure id is echoed (fallback if model forgot)
+    timetable_json["classroom_id"] = payload.id
+    return JSONResponse(content=timetable_json)