# File lib/ruport/formatter/text.rb, line 77
    def build_table_header
      return unless should_render_column_names?

      c = data.column_names.enum_for(:each_with_index).map { |f,i|
        f.to_s.center(max_col_width[i])
      }

      output << fit_to_width("#{hr}| #{c.join(' | ')} |\n")
    end