anchor.diff:          end
       end,
     MinutesATF =
  -    #approximate_time_formatter{
  +    #time_formatter{
          threshold  = 60,
          rounding   = 15,
          split_fun  = MinutesSplitFun,
  
positive.code:   DayQuartersSplitFun =
      fun(Quarters) -> {Quarters div 4, (Quarters rem 4) * 6} end,
    DayQuartersATF =
      #approximate_time_formatter{
         threshold  = 4 * 15,
         rounding   = 4,
         split_fun  = DayQuartersSplitFun,
  
negative.code:   QuartersSplitFun =
      fun(Quarters) -> {Quarters div 4, (Quarters rem 4) * 15} end,
    QuartersATF =
      #time_formatter{
         threshold  = 4 * 3,
         rounding   = 4,
         split_fun  = QuartersSplitFun,
  