Code Style: clarify optional whitespace after closing bracket with semicolon

[lenemter]

Fixes #204

[danirabbit]

Hm I think there should be a blank line after this, no?

Either way needs the // other code part to show whether there is a space or not

[jeremypw]

Aren't these closing braces, strictly speaking? We need to clarify rules about closing braces and closing brackets as we sometimes have a closing bracket on its own line, e.g for long param list:

        long_variable_name = long_function_name (
                long_param_name_1,
                long_param_name_2,
                ((a ,b ,c) => {

                }
        );