# File lib/facet/lisp-format.rb, line 1371
        def execute(state)
          colnum = param(0, state, 1)
          colinc = param(1, state, 1)
          padchar = ?\s.chr
          if at_mod?
            state.output(padchar * colnum)
            state.output(padchar * (colinc - state.col % colinc))
          else
            if state.col < colnum
              state.output(padchar * (colnum - state.col))
            elsif colinc > 0
              k = 1 + (state.col - colnum) / colinc
              state.output(padchar * ((colnum + k * colinc) - state.col))
            end
          end
        end