anchor.diff:  <% upstreams.each_pair do |server_name, upstream_servers| %>
   upstream <%= server_name %> {<% upstream_servers.each do |upstream_server| %>
       server              <%= upstream_server %>;<% end %>
  -}
  -<% end %>
  +}<% end %>
   
   server {        
       listen              <%= define_port %>;
  
positive.code:     access_log          /var/log/nginx/<%= server_name %>.access.log;
      error_log           /var/log/nginx/<%= server_name %>.error.log;
  
      <% if root_dir != '' %>
      root                <%= root_dir %>;
      <% end %>
  
      <% if standard_location_block != '' %>
      location / {
  
negative.code:         proxy_redirect off;       
          if (!-f $request_filename) {
              proxy_pass http://<%= standard_location_block %>;
          }
      }<% end %>
      <% location_blocks.each_pair do |url, content| %>
      location <%= url %> {
          <%= content %>
      }<% end %>
  }
  