Answer by engineersmnky for Ruby Kramdown breaks code block and table in a markdown

Per the Kramdown spec:

• backticks (`) are for inline code
• tildas ~~~ are for code blocks.

Code Span is for Inline Code and differs fromCode Blocks.

The flavor you are currently using for code blocks (```) is Github Flavored Markdown which is why the GFM Parser/converter works. e.g.

    num = 0    while num < 2 do       print("num = ", num)    end    print("End"){: .language-rb}

Is the correct output because 4 spaces is also valid Code Block syntax.

If you want to use the kramdown gem you will have to change this to:

require 'kramdown'code = <<END~~~rubynum = 0while num < 2 do   print("num = ", num)endprint("End")~~~ENDdoc = Kramdown::Document.new(code)doc.to_kramdown

In which case the output is identical to the GFM Parser.