Unclear how to do single file in config; given instructions don't work

[mediapathic]

I'm trying to use na to work with a single file. The instructions given at na - BrettTerpstra.com say "Make it permanent by including the --file flag when running initconfig." However, doing this throws an error (initconfig not recognizing the flag, apparently).

At a guess I tried :file: /path/to/file but that doesn't work.

I don't really mind if the --file flag doesn't work, as long as I can have an example of the correct way of doing this manually.

Thanks!

[mediapathic]

Update for anyone looking for the answer: after further experimentation, the path goes in the :f: field in ~/.na.rc. I leave the issue open though as I think the command line flag should still be fixed (or documentation changed).