What are unnested packages?

Before that commit:

package my.scala.stuff

Here, scala.List(3,4,5) looks for my.scala.List(3,4,5), and gives a
compile error.

After that commit:

package my.scala.stuff

Here, scala.List(3,4,5) gets _root_.scala.List, and works fine.

Suppose I _want_ scala.List to be my.scala.List:

package my
package scala.stuff

Here, scala.List(3,4,5) looks for my.scala.List(3,4,5).

A large recent thread on imports in the scala-user thread gives some
background. I expect someone else is typing a better explanation up.

2009/7/29 Ilya Sergey :
> Hi all.
>
> As I noticed by the broken CI build there was a huge commit on 24th of July,
> which brought unnested packages to Scala. It seems, I missed something
> important. What is the point an semantics of these changes?
>
> With best regards,
> Ilya
>