markdown 1.3

• Switched the underlying Markdown rendering engine from the C library sundown (which has been deprecated for a decade) to the R package commonmark (thanks, @jeroen, yihui/knitr#1329).

• The functions renderMarkdown() and markdownToHTML() have been renamed to mark() and mark_html(), respectively. The old names are still kept in this package for backward-compatibility.

• Removed the arguments stylesheet and fragment.only in mark_html(). For stylesheet, please use the argument meta = list(css = ...) to provide the CSS stylesheet. For fragment.only, please use mark_html(template = FALSE) instead of fragment.only = TRUE. Currently these old arguments are still accepted internally, but may be deprecated and dropped in the long run.

• The file argument of mark() and mark_html() can also take a character vector of Markdown text now.

• Removed functions rendererExists(), rendererOutputType(), and registeredRenderer(). They were primarily for internal use.

• Deprecated the function markdownExtensions(). All extensions should be specified via the options argument of functions like mark(), e.g., mark(options = '+table+tasklist'). See all options on the help page ?markdown::markdown_options.

• Renamed markdownHTMLOptions() to markdown_options().