This parser was built-in until kramdown 2.0 and since then is available through the
It can parse “Github Flavored Markdown”. This is a format of Markdown that is used on Github.com for most places where textual input is required, such as issues and comments. Some of the extensions, notably the “backtick fenced code blocks” are also used on other sites, for example StackOverflow.
See https://github.com/kramdown/parser-gfm for documentation!