with_workaround_for_notextile

# File railties/guides/rails_guides/generator.rb, line 209
    def with_workaround_for_notextile(body)
      code_blocks = []
      body.gsub!(%r{<(yaml|shell|ruby|erb|html|sql|plain)>(.*?)</\1>}m) do |m|
        es = ERB::Util.h($2)
        css_class = ['erb', 'shell'].include?($1) ? 'html' : $1
        code_blocks << %{<div class="code_container"><code class="#{css_class}">#{es}</code></div>}
        "\ndirty_workaround_for_notextile_#{code_blocks.size - 1}\n"
      end

      body = yield body

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