Selection of code leaves gaps on new-lines

Bug description

When you select code in a code chunk in revealjs slides (could not reproduce with html format) it leaves a gap in the selection.

Steps to reproduce

---
format: revealjs
---

```{r}
#| echo: true
mtcars |>
  head()
```

Expected behavior

I expect it to look like this:

Actual behavior

This is what happens when you select

Your environment

• IDE: Version 2023.09.0-daily+203 (2023.09.0-daily+203)
• OS: macOS Venture 13.4

Quarto check output

[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.5: OK
      Dart Sass version 1.55.0: OK
      Deno version 1.33.2: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.4.220
      Path: /Applications/quarto/bin

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

[✓] Checking Python 3 installation....OK
      Version: 3.9.7 (Conda)
      Path: /Users/emilhvitfeldt/miniforge3/bin/python
      Jupyter: (None)

      Jupyter is not available in this Python installation.
      Install with conda install jupyter

[✓] Checking R installation...........OK
      Version: 4.2.1
      Path: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources
      LibPaths:
        - /Users/emilhvitfeldt/Library/R/arm64/4.2/library
        - /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/library
      knitr: 1.43
      rmarkdown: 2.22

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

Start with the provided revealjs Markdown reproducer and compare its code-selection rendering with the HTML format, using the screenshots as the expected and actual behavior. Trace the revealjs code-chunk selection path; done means selecting code across a newline leaves no visual gap while the existing HTML behavior remains unaffected.