## Changes
Users can configure the bundle to not synchronize any files with:
```yaml
sync:
paths: []
```
If it is explicitly configured as an empty list, the validate command
must not warn about not having any files to synchronize. The warning
exists to alert users who are unintentionally not synchronizing any
files (they might have a `.gitignore` pattern that matches everything).
Closes#1663.
## Tests
* New unit test.