Rollup merge of #128014 - GuillaumeGomez:stab-in-doc-blocks, r=notriddle

Fix stab display in doc blocks

Went across this bug randomly:

![Screenshot from 2024-07-20 22-09-49](https://github.com/user-attachments/assets/89fdf427-b00e-4fcb-9d57-078bcb1bacd9)

With the fixed CSS:

![Screenshot from 2024-07-20 22-10-14](https://github.com/user-attachments/assets/eda9a1a6-6a12-408f-bd3a-25bb3397d163)

r? ```@notriddle```