Log Message:
(textproc/R-rmarkdown) Updated 2.1 to 2.3

rmarkdown 2.3
================================================================================

- Addressed an accessibility issue in highlighted code blocks of HTML
  output for screen reader users: screen readers no longer read out an
  unnecessary code line id values (thanks, @jooyoungseo and @atusy,
  #1833).

- Added `file_scope` option to output format definition. This enables
  handling of duplicate numeric footnote identifiers (e.g. across
  bookdown chapters) via the pandoc `--file-scope` option (#1837).

- Added the customizable `lang` atrribute to `ioslides_presentation`
  output (thanks, @jooyoungseo, #1841).

- Added `publish_site()` function for "one-button" publishing of R
  Markdown websites.

- When the `df_print` option is `kable` and the output format is not
  HTML, `<div class="kable-table">` is no longer added to the
  `kable()` output, because recent versions of Pandoc will convert the
  `div` to a LaTeX environment when the output format is LaTeX
  (thanks, Laurens, https://stackoverflow.com/q/62340425/559676).

- `html_vignette()` only warns against differences in the vignette
  title and the vignette index entry for R >= 3.6.0 (thanks, @krlmlr,
  #1832).

- `html_document()` can apply `code_folding` on any chunk engines if
  the `foldable` class is added to a source code block via the chunk
  options (`class.source` or `attr.source`). You may apply this
  feature to all the source code blocks, for example, by setting
  `knitr::opts_chunk$set(class.source = "foldable")` at the beginning
  of your document (thanks, @atusy, #1835).

rmarkdown 2.2
================================================================================

- Exported the internal function `find_pandoc()`, and also added two
  arguments, `dir` and `version`, so that users can provide a custom
  directory under which this function may find Pandoc, as well as an
  expected version of Pandoc to be found (thanks, @connorp, #1785).

- `pandoc_metadata_arg()` is a new Pandoc helper function to generate
  `--metadata` argument for Pandoc command line (thanks, @cderv,
  #1789).

- The output format `html_vignette()` now warns against differences in
  the vignette title specified in the `title` field in the YAML
  metadata and the one specified inside
  `\VignetteIndexEntry{}`. Normally they are expected to be identical
  (#1789).

- Fixed a bug with encoding when rendering `html_notebook` containing
  HTML widgets (thanks, @cderv, #1799).

- TOC title can now be specified for `html_document` via the top-level
  option `toc-title` in the YAML frontmatter (thanks, @atusy, #1771).

- Floating TOC can now distinguish upper/lower-cases (thanks, @atusy,
  #1783).

- When `code_folding='show'` for the output format `html_document`,
  code blocks can be individually hidden initially by specifying the
  chunk option `class.source='fold-hide'` (thanks, @atusy, #1798).

- For LaTeX/PDF output formats `pdf_document`, `beamer_presentation`,
  and `context_document`, the argument `citation_package = 'none'` was
  deprecated, and `citation_package = 'default'` should be used
  instead if citations are to be processed by `pandoc-citeproc`
  (thanks, @njbart, rstudio/bookdown#754).

- `output_format()` can now inherit `keep_md` and `clean_supporting`
  from `base_format` when `NULL` is passed to these
  arguments. Previously, you must explicitly specify `keep_md` and/or
  `clean_supporting` as `TRUE` or `FALSE` in `output_format()` since
  they could not inherit the corresponding options of
  `base_format`. This behavior was not consisent with other arguments
  of `output_format()` (thanks, @atusy, #1823).

- The `smart` argument of most output formats has been removed,
  because Pandoc's `smart` extension is enabled by default, and
  setting `smart: false` for an output format did not really have any
  effect (which could be considered a bug, but we want to get rid of
  this option since it existed only for a historical reason for Pandoc
  1.x, and Pandoc 2.x has been released for more than two years). If
  you want to disable the `smart` extension, you can use the option
  `md_extensions: -smart` of the output format (thanks, @atusy,
  #1774).

- `pdf_document()` should not specify the `geometry` variable when the
  `documentclass` variable is passed to Pandoc (thanks, @jpcirrus,
  #1782).

- `render()` now respects the YAML metadata in the R script when
  rendering the script with Pandoc 2.8 or later (thanks, @nsoranzo
  #1740, @cderv #1741).

- For `pandoc_convert()`, when the argument `to = 'pdf'`, it will be
  changed to `'latex'` internally (thanks, @JohannesFriedrich, #1802).

- `render(run_pandoc = FALSE)` no longer cleans up the Markdown file
  (typically knitted from Rmd) (thanks, @BrianDiggs, #1812).