Adva driver fixes

[ktbyers]

Linting plus setting terminator argument.

[ktbyers]

@Gatorjosh14 Fixed the linting.

Note, I set the terminator parameter in send_config_set() to terminator: str = r"-->", (as None is not allowed here--due to it being a string). I thought this was the correct setting for it (on quick glance at the code).