Added an alias for cleanup within `arc duck` alias to `/etc/arcconfig file and ran `arc
cleanup``, saw arc patch branches get deleted.ran `arc duck`, Added a new cleanup alias
into the user's configuration using `arc alias cleanup '!ls'` and saw
and ran `arc cleanup` and saw the listed contents of the directory,
overriding the system configurationsaw "quack".
Added an `arc pig` alias to `~/.arcrc` via `arc alias`, ran `arc pig`, saw "oink oink".