Documentation renders email with unexpected gaps

[juleswg23]

We see different output for the following code snippet.

from nbmail.compose import compose_email, create_blocks, block_title, block_text

email = compose_email(
    header=create_blocks(block_title("Newsletter")),
    body=create_blocks(
        block_text("Welcome to this week's update!"),
        block_text("Here's what's new..."),
    ),
    footer=create_blocks(block_text("© 2025 My Company"))
)

email

There are more gaps in the docs than in the notebook or the email. As discussed over zoom with @rich-iannone and @machow, there may be an approach to box in the output to ensure nothing propagates into the documentation.

Rendered in the notebook:

Rendered in an email in the gmail client:

Rendered in the docs (extra spacing):