    # File lib/chef/knife/core/generic_presenter.rb, line 58
            def format(data)
              case parse_format_option
              when :summary
                summarize(data)
              when :text
                text_format(data)
              when :json
                Chef::JSONCompat.to_json_pretty(data)
              when :yaml
                require 'yaml'
                YAML::dump(data)
              when :pp
                # If you were looking for some attribute and there is only one match
                # just dump the attribute value
                if data.length == 1 and config[:attribute]
                  data.values[0]
                else
                  out = StringIO.new
                  PP.pp(data, out)
                  out.string
                end
              end
            end