# File lib/facet/lisp-format.rb, line 1423
        def execute(state)
          if at_mod?
            formatter = Formatter.new(state.next_arg, state)
          else
            format = state.next_arg
            state = State.new(state.next_arg, state.latest_output)
            formatter = Formatter.new(format, state)
          end
          formatter.run
        end