class Kramdown::Converter::Html

def convert_thead(el, indent, opts)
  opts[:cell_type] = case el.type
                     when :thead then 'th'
                     when :tbody, :tfoot then 'td'
                     else opts[:cell_type]
                     end
  "#{' '*indent}<#{el.type}#{options_for_element(el)}>\n#{inner(el, indent, opts)}#{' '*indent}</#{el.type}>\n"
end