Double installs

[Joshua Root]

Scott Haneda wrote:
> For the sake of helping others.  From IRC, I learned `port list
> installed` is sort of broken, do not use it, use `port installed` instead.

It's not broken, it just doesn't do what you thought it did. The port
man page and `port help list` are pretty clear about what it actually does.

> If there is an archive of IRC, there is more detail about why in that.

<http://echelog.matzon.dk/logs/browse/macports/>

- Josh