Improve documentation of cache-directories

[rukai]

The documentation for cache-directories says:

    # Additional non workspace directories to be cached, separated by newlines.
    cache-directories: ""

From reading this, two things aren't clear to me:

1

What exactly is meant by "newlines".

Can I do something like this:

   cache-directories: |
     entry1
     entry2

Or do I need to do something like this:

   cache-directories: "entry1\nentry2"

An example in the docs would be great, otherwise an example in https://github.com/Swatinem/rust-cache/tree/master/.github/workflows could be an alternative.

2

Does "non workspace" mean directories outside of the target folder?
If I do specify such "non workspace" directories does rust-cache just ignore them?