It seems that the `localhost` and the `6700` are default values (see constructor arguments of plugin). Usually the optional values are documented in the example using a `#` in front of the line, e.g.:
```
[elro]
   class_name = Elro
   class_path = plugins.elro
#   elro_host = "localhost"
#   elro_port = 6700
```
The mandatory hint should also be removed then.