[docs] fix output question (#177842)
See the code:
<img width="2631" height="1090" alt="image"
src="https://github.com/user-attachments/assets/dfe949b3-fbc6-4cd3-9e8d-5c0adbfcc67a"
/>
<img width="1751" height="577" alt="image"
src="https://github.com/user-attachments/assets/e3b78596-24b9-4bd5-b40d-a4154b2e6bb2"
/>
So the output is not the number, is the text "__anon_expr".
