mozilla/rust — pull request #4586 by thestinger (2013-01-23 03:40:16+00:00)
Title: drop is_not_empty from TreeSet/TreeMap

I added this method because it seemed like an existing convention, but now I've realized the `is_not` methods are just a legacy thing. This method wasn't implemented in `send_map`, and I left it off the `Container` trait. It's simpler just to have `is_empty` and use `!foo.is_empty()`.