callouts: different amounts of leading/trailing whitespace

[aronatkins]

Bug description

Callouts, such as this note, are given a different amount of leading and trailing whitespace.

This is super nit-picky, so feel free to close as a non-issue. We noticed this because the spacing of callouts is different than what we were used to with the admonitions from mkdocs-material: https://squidfunk.github.io/mkdocs-material/reference/admonitions/#usage

Steps to reproduce

The _quarto.yml:

project:
  type: website

format:
  html:
    toc: true
    theme: cosmos

The index.qmd:

---
title: callouts
---

This is text before the callout.

::: {.callout-note}
We have one line.
:::

This is text after the callout.

Expected behavior

The leading and trailing whitespace should be consistent, which let a single-line or single-paragraph be vertically centered within the callout.

Actual behavior

No response

Your environment

No response

Quarto check output

[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.1: OK
      Dart Sass version 1.55.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.3.353
      Path: /Applications/RStudio.app/Contents/Resources/app/quarto/bin

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.9.6
      Path: /Library/Developer/CommandLineTools/usr/bin/python3
      Jupyter: (None)

      Jupyter is not available in this Python installation.
      Install with python3 -m pip install jupyter

[✓] Checking R installation...........OK
      Version: 3.6.3
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Library/Frameworks/R.framework/Versions/3.6/Resources/library
      knitr: 1.42.8
      rmarkdown: 2.20

[✓] Checking Knitr engine render......OK