Doc styler tip
# What does this PR do?

This PR makes sure the doc styler considers the start and end of Tip blocks as paragraph-breakers. For instance
```py
"""
<Tip>
Short tip with no new line
</Tip>
"""
```
is currently restyled on one line (which may or may not work with the frontend).

With this PR, it's restyled like this:
```
"""
<Tip>

Short tip with no new line

</Tip>
"""
```

I can remove the part that adds new lines if you think it's too much.