# File lib/chef/knife.rb, line 383
    def highlight_config_error(file, line)
      config_file_lines = []
      IO.readlines(file).each_with_index {|l, i| config_file_lines << "#{(i + 1).to_s.rjust(3)}: #{l.chomp}"}
      if line == 1
        lines = config_file_lines[0..3]
        lines[0] = ui.color(lines[0], :red)
      else
        lines = config_file_lines[Range.new(line - 2, line)]
        lines[1] = ui.color(lines[1], :red)
      end
      ui.msg ""
      ui.msg ui.color("     # #{file}", :white)
      lines.each {|l| ui.msg(l)}
      ui.msg ""
    end