rmarkdown 2.22

• Using css with .scss and .sass file, or with a bslib theme, now works as expected with a shiny runtime (thanks, @cpsievert, #2443, #2447).

• Add a pandoc_metadata_file_arg() function to match Pandoc's CLI flag --metadata-file.

• Mentions that webshot or webshot2 is required to take screenshot of HTML widget. When not installed, an error message mentionning always_allow_html: true solution will be shown, but setting this is not the solution (quarto-dev/quarto-cli#4225).

• html_dependency_jqueryui() updated to 1.13.2 from version bundled in shiny (thanks, @daschnerm, #2477).

• Fix an issue with YAML header ending with a commented line containing incomplete yaml (thanks, @keithnewman, #2483).

• When code folding is enabled in html_document(), the text on the button to show the content has been changed from "Code" to "Show", because the content to show is not necessarily code, e.g., yihui/knitr#2227.