Add ability to pass example args using params syntax

[seclerp]

The most used way of specifying the examples is by hardcoding values. So it will be much easier without additional new [] { ... } syntax noise, but with the same outcome.

With params you are still able to specify items as an array, so the compatibility is kept.

[dnfadmin]

All CLA requirements met.

[FrankRay78]

Thank you @seclerp for this high-quality contribution, it's much appreciated.