Parsed launch file as output

[madis002]

Thank you for the great package!
I guess the project is not actively worked on any more, but if development should continue, I think getting the parsed launch file as output would be a great addition to the package.
Rqt_launchtree is already quite useful for debugging. I think adding the ability to generate a monolithic launch file with all the argument substitution, evaluated python expressions, nested includes etc would make the package even better for debugging complex launch files.

[pschillinger]

This is an interesting idea, maybe we can add such a feature at some point.