Somewhat unclear/wrong information about paths and modules

In chapter  Modules / Filesystem Hierarchy there is:

`mod garden`;
 
> This tells Rust that the garden module content is found at src/garden.rs. Similarly, a garden::vegetables module 
> can be  found at src/garden/vegetables.rs.

Which might imply that

`mod garden::vegetables;`

can be used, which is not true, to use such layout:

> src/garden/vegetables.rs

a more complex setup is required.
