anchor.diff:  %% in real life.
   context() ->
       [
  +        {handoff_ip, "0.0.0.0"},
           {handoff_port, "8099"},
           {platform_bin_dir , "./bin"},
           {platform_data_dir, "./data"},
  
positive.code:         {["ssl", "certfile"], "/absolute/etc/cert.pem"},
          {["ssl", "keyfile"], "/absolute/etc/key.pem"},
          {["ssl", "cacertfile"], "/absolute/etc/cacertfile.pem"},
          {["handoff", "port"], 8888},
          {["handoff", "ssl", "certfile"], "/tmp/erlserver.pem"},
          {["handoff", "ssl", "keyfile"], "/tmp/erlkey/pem"},
  
negative.code:     cuttlefish_unit:assert_config(Config, "riak_core.ssl.certfile", "/absolute/etc/cert.pem"),
      cuttlefish_unit:assert_config(Config, "riak_core.ssl.keyfile", "/absolute/etc/key.pem"),
      cuttlefish_unit:assert_config(Config, "riak_core.ssl.cacertfile", "/absolute/etc/cacertfile.pem"),
      cuttlefish_unit:assert_config(Config, "riak_core.handoff_ip", "1.2.3.4"),
      cuttlefish_unit:assert_config(Config, "riak_core.handoff_port", 8888),
      cuttlefish_unit:assert_config(Config, "riak_core.handoff_ssl_options.certfile", "/tmp/erlserver.pem"),
      cuttlefish_unit:assert_config(Config, "riak_core.handoff_ssl_options.keyfile", "/tmp/erlkey/pem"),
  