I wanted to output thelist_model_info for some of our models (we have hundreds), but currently can a) either outputall of them or b) call the commandonce per--model. I found that non-intuitive and would much prefer to be able to specify the desired models in a single command.

This PR changeslist_model_info --model app.Model tolist_model_info --models app1.Model1,app2.Model2,app3.Model3.

Since Django's management commands useargparse with a forgiving CLI option config, the old--model option will still work the exact same way as before (as it will match to the new --models), thus the change is backwards compatible.

Maybe it's worth thinking about something like this? The API could be different (e.g. support using--model more than once, or
handle multiple arguments, or a separate option).