anchor.diff:    nesting = {
       children = mkOption {
         default = [];
  -      description = ''
  +      description = "
           Additional configurations to build.
  -      '';
  +      ";
       };
     };
   
  
positive.code:             ipAddress = "192.168.1.11";
            }
          ];
          description = ''
            A list mapping ethernet addresses to IP addresses for the
            DHCP server.
          '';
        };
  
      };
  
negative.code:     nix = mkOption {
        default = pkgs: pkgs.nix;
        example = pkgs: pkgs.nixCustomFun /root/nix.tar.gz;
        description = "
          Use non-default Nix easily. Be careful, though, not to break everything.
        ";
      };
  
    };
  