with_workaround_for_notextile

# File railties/guides/rails_guides/generator.rb, line 208
    def with_workaround_for_notextile(body)
      code_blocks = []

      body.gsub!(%{<(yaml|shell|ruby|erb|html|sql|plain)>(.*?)</\11>>}) do |m|
        brush = case $1
          when 'ruby', 'sql', 'plain'
            $1
          when 'erb'
            'ruby; html-script: true'
          when 'html'
            'xml' # html is understood, but there are .xml rules in the CSS
          else
            'plain'
        end

        code_blocks.push(<notextile><div class="code_container"><pre class="brush: #{brush}; gutter: false; toolbar: false">#{ERB::Util.h($2).strip}</pre></div></notextile>)
        "\ndirty_workaround_for_notextile_#{code_blocks.size - 1}\n"
      end

      body = yield body

      body.gsub(%{<p>dirty_workaround_for_notextile_(\d+)</p>}) do |_|
        code_blocks[$1.to_i]
      end
    end