# File lib/ruport/formatter/html.rb, line 44
    def build_table_header
      output << "\t<table>\n"
      unless data.column_names.empty? || !show_table_headers
        output << "\t\t<tr>\n\t\t\t<th>" + 
          data.column_names.join("</th>\n\t\t\t<th>") + 
          "</th>\n\t\t</tr>\n"
      end
    end