# File lib/facet/lisp-format.rb, line 1472
        def execute(state)
          output = state.pop_output.to_s
          state.output(
                      case state.case_conv
                      when :DOWN
                        output.downcase
                      when :CAP
                        output.gsub(/\w+/) do |w| w.capitalize end
                      when :CAP_FIRST
                        output.capitalize
                      when :UP
                        output.upcase
                      end
                      )
        end