Callout icons can't be suppressed in callouts without headings in HTML docs

[c-zippel]

Hi, In HTML documents, setting the apperance="minimal" or icon=false attribute on a callout does not suppress the icon when the callout doesn't contain a header. Same goes for setting callout-appearance: minimal or callout-icon: false in the global options. This issue does not occur in PDF documents.

Reprex:

---
title: "Callout Icons"
format: html
---

::: {.callout-warning appearance="minimal"}

This is a callout without a heading. 

The icon is not suppressed.

:::

::: {.callout-warning appearance="minimal"}

# This callout has a heading. 

The icon is suppressed as expected.

:::

Session Info

``` R version 4.2.0 (2022-04-22 ucrt) Platform: x86_64-w64-mingw32/x64 (64-bit) Running under: Windows 10 x64 (build 19044), RStudio 2022.2.0.443 Locale: LC_COLLATE=English_United States.utf8 LC_CTYPE=English_United States.utf8 LC_MONETARY=English_United States.utf8 LC_NUMERIC=C LC_TIME=English_United States.utf8 Package version: base64enc_0.1.3 bslib_0.3.1 cli_3.3.0 compiler_4.2.0 digest_0.6.29 evaluate_0.15 fastmap_1.1.0 fs_1.5.2 glue_1.6.2 graphics_4.2.0 grDevices_4.2.0 highr_0.9 htmltools_0.5.2 jquerylib_0.1.4 jsonlite_1.8.0 knitr_1.39 later_1.3.0 magrittr_2.0.3 methods_4.2.0 processx_3.5.3 ps_1.7.0 quarto_1.1 R6_2.5.1 rappdirs_0.3.3 Rcpp_1.0.8.3 rlang_1.0.2 rmarkdown_2.14 rstudioapi_0.13 sass_0.4.1 stats_4.2.0 stringi_1.7.6 stringr_1.4.0 tinytex_0.39 tools_4.2.0 utils_4.2.0 xfun_0.31 yaml_2.3.5 ```

Quarto Check

I'm not sure why the check could not locate R. I can run R code chunks in Quarto documents just fine. ``` [>] Checking Quarto installation......OK Version: 0.9.510 Path: C:\Users\czippel\AppData\Local\Programs\Quarto\bin\ CodePage: 1252 [>] Checking basic markdown render....OK [>] Checking Python 3 installation....OK Version: 3.9.11 (Conda) Path: C:/Users/czippel/Anaconda3/python.exe Jupyter: 4.9.2 Kernels: python3 [>] Checking Jupyter engine render....OK [>] Checking R installation...........(None) Unable to locate an installed version of R. Install R from https://cloud.r-project.org/ ```

Checklist

When filing a bug report, please check the boxes below to confirm that you have provided us with the information we need. Have you:

• [x] formatted your issue so it is easier for us to read?
• [x] included a minimal, self-contained, and reproducible example?
• [x] documented the quarto version you're running, by providing the output produced by quarto check in a terminal in your issue?
• [x] upgraded to the latest version (including your versions of R, the RStudio IDE, and relevant R packages)?

[dragonstyle]

This should be fixed - thanks for reporting!

[c-zippel]

Thanks so much!!