Navigation

[lerina]

Hi,
using the same file for different SUMMARY entries breaks the navigation

- [Basics](beginner/setup.md)
  - [Setup](beginner/setup.md)
... 
- [Memory Safety](beginner/ownership.md)
  - [Ownership](beginner/ownership.md)

The Rust Programming Language Book uses chapters like this:

## Getting started

- [Getting Started](ch01-00-getting-started.md)
    - [Installation](ch01-01-installation.md)

One solution would be to duplicate (or symlink) setup.md into

- [Basics](beginner/ch01-00-setup.md)
  - [Setup](beginner/ch01-01-setup.md)

Of course having real different information for Basic, and Setup would avoid this hack