The Github fork of cmark supports several markdown extensions which provide features which are not (yet) in the official commonmark spec.
list_extensions()
Currently the following extensions are supported:
table support rendering of tables
strikethough via ~sometext~ syntax
~sometext~
autolink automatically turn URLs into hyperlinks
tagfilter blacklist html tags: title textarea style xmp iframe noembed noframes script plaintext.
title
textarea
style
xmp
iframe
noembed
noframes
script
plaintext
See also the spec for GitHub Flavored Markdown.
# NOT RUN { print(list_extensions()) # }
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