anchor.diff:  ###########
   
   <% @options.each do |option,value| -%>
  -  <%- if @value != undef -%>
  -<%= @option %>	<%= @value %>
  +  <%- if value.to_s != 'undef' -%>
  +<%= option %>	<%= value %>
     <%- end -%>
   <% end -%>
   
  
positive.code: # i.e. hourly, daily, weekly, monthly.  #
  #########################################
  
  <% if @retain_hourly > 0 %>
  retain		hourly	<%= @retain_hourly %>
  <% end %>
  <% if @retain_daily > 0 %>
  retain		daily	<%= @retain_daily %>
  <% end %>
  <% if @retain_weekly > 0 %>
  retain		weekly	<%= @retain_weekly %>
  <% end %>
  <% if @retain_monthly > 0 %>
  retain		monthly	<%= @retain_monthly %>
  <% end %>
  
  
negative.code: #################################
  
  <% @programs.each do |program,directory| -%>
  <%= program %>	<%= directory %>
  <% end -%>
  
  ###########
  