Fava is restarted instead of being killed when re-running beancount-fava command

[superuser-does]

Executing beancount-fava to start it gives the expected message in the echo area:

Fava process started

Executing beancount-fava a second time, which is supposed to kill the process, simply restarts it:

Fava process killed
Fava process started

Ideally, executing it a second time would stop the server - and I think this is what you were going for based on the fact this message appears in the echo area (use view-echo-area-messages to see the log).