Improper spacing of QED symbol in PDF output

[sun123zxy]

Bug description

A reminder for a left-behind problem mentioned in #3776.

Steps to reproduce

---
title: "QED symbol test"
format:
    pdf:
        keep-tex: true
---

:::{.proof}
This is a proof.
:::

Expected behavior

Should produce LaTeX code like this:

\begin{proof}
This is a proof.
\end{proof}

which handle the spacing of QED symbol properly.

Actual behavior

However, Quarto actually produces this

\begin{proof}

This is a proof.

\end{proof}

The empty line inserted before \end{proof} causes the QED symbol lies in a new line, instead of the end of the last line of the proof.

Probably helpful

Your environment

• IDE: vscode
• OS: Windows 11

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: 1.3.340
      Path: C:\Program Files\Quarto\bin
      CodePage: 936

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

[>] Checking Python 3 installation....(None)

      Unable to locate an installed version of Python 3.
      Install Python 3 from https://www.python.org/downloads/

[>] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/

[cscheid]

(note to self: I think the problem here comes from pandoc latex RawBlocks forcing line spaces around them. We have a design for a filter-based partial solution in a branch, but this argues for a more comprehensive fix.)