Application arguments for `pman run`

[Schwarzbaer]

pman run should allow for arguments to be passed to the application, e.g.: pman run -- app_arg invokes main.py app_arg

[Moguri]

With 7fd38119114722538b777d7a2d4dc6331431328a, extra arguments can be specified via a extra_args config variable in the run section.

When specifying extra arguments with pman run, would you expect that these args get appended to args from the config or to override them?

Maybe - for append and -- for override?