anchor.diff:  
   <%- if @smtp_server %>
   # - Email configuration
  -# http://docs.tsuru.io/en/latest/reference/config.html#email-configuration
  +# http://docs.tsuru.io/en/stable/reference/config.html#email-configuration
   smtp:
     server: <%= @smtp_server %>
     user: <%= @smtp_user %>
  
positive.code: <%- end %>
  
  # - Authentication configuration
  # http://docs.tsuru.io/en/latest/reference/config.html#authentication-configuration
  auth:
    scheme: <%= @auth_scheme %>
    user-registration: <%= @auth_user_registration %>
  
negative.code: <%= @index_page_template ? "index-page-template: #{@index_page_template}" : '' %>
  
  # - Database access
  # http://docs.tsuru.io/en/stable/reference/config.html#database-access
  database:
    url: <%= @mongodb_url %>
    name: <%= @mongodb_database_name %>
  