# File lib/main/util.rb, line 14
      def indent chunk, n = 2
        lines = chunk.split %r/\n/
        re = nil
        s = ' ' * n
        lines.map! do |line|
          unless re
            margin = line[%r/^\s*/]
            re = %r/^#{ margin }/
          end
          line.gsub re, s 
        end.join("\n")
      end